diff --git a/.github/workflows/chipdb.yml b/.github/workflows/chipdb.yml
index 93b75e81..b223b9e0 100644
--- a/.github/workflows/chipdb.yml
+++ b/.github/workflows/chipdb.yml
@@ -11,6 +11,19 @@ on:
   pull_request:
 
 jobs:
+  family_info:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Build family_info.json
+      run: |
+        docker pull pepijndevos/apicula:1.9.8
+        docker run -v $(pwd):/usr/src/apicula pepijndevos/apicula:1.9.8 make apycula/family_info.json
+    - name: Archive artifact
+      uses: actions/upload-artifact@v3
+      with:
+          name: family_info.json
+          path: apycula/family_info.json
   gw1n1:
     runs-on: ubuntu-latest
     steps:
diff --git a/Makefile b/Makefile
index 6a44c478..b635966f 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,8 @@ endif
 .PHONY: all clean
 all: apycula/GW1N-1.pickle apycula/GW1N-9.pickle apycula/GW1N-4.pickle \
 	 apycula/GW1NS-2.pickle apycula/GW1NS-4.pickle apycula/GW1N-9C.pickle \
-	 apycula/GW1NZ-1.pickle apycula/GW2A-18.pickle apycula/GW2A-18C.pickle
+	 apycula/GW1NZ-1.pickle apycula/GW2A-18.pickle apycula/GW2A-18C.pickle \
+	 family_info.json
 
 %.json: apycula/dat19_h4x.py
 	python3 -m apycula.dat19_h4x $*
@@ -20,7 +21,12 @@ all: apycula/GW1N-1.pickle apycula/GW1N-9.pickle apycula/GW1N-4.pickle \
 apycula/%.pickle: %_stage2.pickle
 	gzip -c $< > $@
 
+apycula/family_info.json: apycula/build_family_info.py
+	python3 -m apycula.build_family_info
+	cp family_info.json apycula/
+
 clean:
 	rm *.json
 	rm *.pickle
 	rm apycula/*.pickle
+	rm apycula/family_info.json
diff --git a/apycula/build_family_info.py b/apycula/build_family_info.py
new file mode 100644
index 00000000..97946d85
--- /dev/null
+++ b/apycula/build_family_info.py
@@ -0,0 +1,48 @@
+import json
+import os
+import subprocess
+from collections import defaultdict
+
+def build_family_aliases():
+    db_hashes = defaultdict(list)
+    
+    family_info = defaultdict(dict)
+
+    # load IDCODEs from programmer.json
+    with open("/usr/src/gowin/IDE/bin/programmer.json") as f:
+        data = json.loads(f.read())
+        for device_data in data["DEVICE_CONFIG"]:
+            if device_data["DEVICE"] == "JTAG_NOP":
+                continue
+
+            family_info[device_data["DEVICE"]]["idcode"] = device_data["IDCODE"]
+
+    # if devices have the same *.fse hash, assume they are the same family
+    md5_exec = subprocess.run("md5sum /usr/src/gowin/IDE/share/device/*/*.fse", 
+                              shell=True, check=True, capture_output=True,
+                              encoding='utf-8')
+
+    for line in md5_exec.stdout.splitlines():
+        computed_hash, path = line.split("  ")
+        family = os.path.split(path)[-1].replace(".fse", "")
+        db_hashes[computed_hash].append(family)
+
+    for computed_hash, families in db_hashes.items():
+        # arbitrarily use the shortest family as the "true" family
+        families.sort(key=lambda x: (len(x), x))
+
+        for family in families:
+            base_family = families[0]
+            family_info[family]["base_family"] = base_family
+
+            # if the family has no IDCODE, try to inherit from the base family
+            if "idcode" not in family_info[family] and "idcode" in family_info[base_family]:
+                family_info[family]["idcode"] = family_info[families[0]]["idcode"]
+
+    return family_info
+
+
+if __name__ == "__main__":
+    family_aliases = build_family_aliases()
+    with open("family_info.json", "w") as f:
+        f.write(json.dumps(dict(family_aliases), indent=2))
diff --git a/apycula/family_aliases.py b/apycula/family_aliases.py
new file mode 100644
index 00000000..82598a75
--- /dev/null
+++ b/apycula/family_aliases.py
@@ -0,0 +1,13 @@
+import importlib.resources
+import json
+
+def replace_family_alias(family):
+    with importlib.resources.path('apycula', f'family_info.json') as path:
+        with open(path, 'r') as f:
+            family_info = json.load(f)
+
+    if family in family_info:
+        return family_info[family]["base_family"]
+    else:
+        return family
+
diff --git a/apycula/gowin_pack.py b/apycula/gowin_pack.py
index c3d3d859..faf6e50d 100644
--- a/apycula/gowin_pack.py
+++ b/apycula/gowin_pack.py
@@ -17,6 +17,7 @@
 from apycula import attrids
 from apycula import bslib
 from apycula.wirenames import wirenames, wirenumbers
+from apycula.family_aliases import replace_family_alias
 
 device = ""
 pnr = None
@@ -1029,12 +1030,25 @@ def route(db, tilemap, pips):
         for row, col in bits:
             tile[row][col] = 1
 
-def header_footer(db, bs, compress):
+def header_footer(db, bs, compress, family):
     """
     Generate fs header and footer
     Currently limited to checksum with
     CRC_check and security_bit_enable set
     """
+    # override part IDCODE in header
+    assert db.cmd_hdr[3][0] == 0x06  # IDCODE data
+    
+    with importlib.resources.path('apycula', f'family_info.json') as path:
+        with open(path, 'r') as f:
+            family_info = json.load(f)
+
+    if family in family_info and "idcode" in family_info[family]:
+        db.cmd_hdr[3][-4:] = bytes.fromhex(family_info[family]["idcode"])
+    else:
+        print("Not overriding IDCODE as it is not present in family_info.json")
+
+    # calculate checksum
     bs = np.fliplr(bs)
     bs=np.packbits(bs)
     # configuration data checksum is computed on all
@@ -1157,7 +1171,7 @@ def main():
         parser.add_argument('--png')
 
     args = parser.parse_args()
-    device = args.device
+    device = replace_family_alias(args.device)
 
     with open(args.netlist) as f:
         pnr = json.load(f)
@@ -1173,7 +1187,9 @@ def main():
         mods = m.group(1) or ""
         luts = m.group(3)
         device = f"GW1N{mods}-{luts}"
-    with importlib.resources.path('apycula', f'{args.device}.pickle') as path:
+        device = replace_family_alias(device)
+
+    with importlib.resources.path('apycula', f'{device}.pickle') as path:
         with closing(gzip.open(path, 'rb')) as f:
             db = pickle.load(f)
 
@@ -1206,7 +1222,7 @@ def main():
             tile[row][col] = 0
 
     res = chipdb.fuse_bitmap(db, tilemap)
-    header_footer(db, res, args.compress)
+    header_footer(db, res, args.compress, device)
     if pil_available and args.png:
         bslib.display(args.png, res)
     bslib.write_bitstream(args.output, res, db.cmd_hdr, db.cmd_ftr, args.compress)
diff --git a/apycula/gowin_unpack.py b/apycula/gowin_unpack.py
index b8566f75..bc2ec623 100644
--- a/apycula/gowin_unpack.py
+++ b/apycula/gowin_unpack.py
@@ -14,6 +14,7 @@
 from apycula import attrids
 from apycula.bslib import read_bitstream
 from apycula.wirenames import wirenames
+from apycula.family_aliases import replace_family_alias
 
 _device = ""
 _pinout = ""
@@ -1074,7 +1075,7 @@ def main():
     args = parser.parse_args()
 
     global _device
-    _device = args.device
+    _device = replace_family_alias(args.device)
     # For tool integration it is allowed to pass a full part number
     m = re.match("GW1N(S?)[A-Z]*-(LV|UV|UX)([0-9])C?([A-Z]{2}[0-9]+P?)(C[0-9]/I[0-9])", _device)
     if m:
diff --git a/examples/Makefile b/examples/Makefile
index 27d024c1..331a64aa 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -121,16 +121,16 @@ pll-tangnano4k.json: pll-tangnano4k-synth.json tangnano4k.cst
 	$(NEXTPNR) --json $< --write $@ --device GW1NSR-LV4CQN48PC7/I6 --cst tangnano4k.cst
 
 %-tangnano9k.fs: %-tangnano9k.json
-	gowin_pack -d GW1N-9C -o $@ $^
+	gowin_pack -d GW1NR-9C -o $@ $^
 
 pll-nanolcd-tangnano9k.fs: pll-nanolcd-tangnano9k.json
-	gowin_pack -d GW1N-9C --sspi_as_gpio --mspi_as_gpio -o $@ $^
+	gowin_pack -d GW1NR-9C --sspi_as_gpio --mspi_as_gpio -o $@ $^
 
 %-tangnano9k.json: %-tangnano9k-synth.json tangnano9k.cst
-	$(NEXTPNR) --json $< --write $@ --device GW1NR-LV9QN88PC6/I5 --family GW1N-9C --cst tangnano9k.cst
+	$(NEXTPNR) --json $< --write $@ --device GW1NR-LV9QN88PC6/I5 --family GW1NR-9C --cst tangnano9k.cst
 
 %lvds-tangnano9k.json: %lvds-tangnano9k-synth.json lvds-tangnano9k.cst
-	$(NEXTPNR) --json $< --write $@ --device GW1NR-LV9QN88PC6/I5 --family GW1N-9C --cst lvds-tangnano9k.cst
+	$(NEXTPNR) --json $< --write $@ --device GW1NR-LV9QN88PC6/I5 --family GW1NR-9C --cst lvds-tangnano9k.cst
 
 %-honeycomb.fs: %-honeycomb.json
 	gowin_pack -d GW1NS-2 -o $@ $<
@@ -264,7 +264,7 @@ pll-%-honeycomb-synth.json: pll/GW1NS-2C-%.vh pll.v pll/rpll.v
 	$(NEXTPNR) --json $< --write $@ --device GW1NSR-LV4CQN48PC7/I6 --cst longwires/tangnano4k.cst
 
 %-lw-tangnano9k.json: %-tangnano9k-synth.json longwires/tangnano9k.cst
-	$(NEXTPNR) --json $< --write $@ --device GW1NR-LV9QN88PC6/I5 --family GW1N-9C --cst longwires/tangnano9k.cst
+	$(NEXTPNR) --json $< --write $@ --device GW1NR-LV9QN88PC6/I5 --family GW1NR-9C --cst longwires/tangnano9k.cst
 
 %-lw-runber.json: %-runber-synth.json longwires/runber.cst
 	$(NEXTPNR) --json $< --write $@ --device GW1N-UV4LQ144C6/I5 --cst longwires/runber.cst
diff --git a/examples/himbaechel/Makefile.himbaechel b/examples/himbaechel/Makefile.himbaechel
index 6b6fa623..424232d6 100644
--- a/examples/himbaechel/Makefile.himbaechel
+++ b/examples/himbaechel/Makefile.himbaechel
@@ -141,10 +141,10 @@ clean:
 # ============================================================
 # Tangnano20k
 %-tangnano20k.fs: %-tangnano20k.json
-	gowin_pack -d GW2A-18C -o $@ $<
+	gowin_pack -d GW2AR-18C -o $@ $<
 
 %-tangnano20k.json: %-tangnano20k-synth.json tangnano20k.cst
-	$(NEXTPNR) --json $< --write $@ --device GW2AR-LV18QN88C8/I7 --vopt family=GW2A-18C --vopt cst=tangnano20k.cst
+	$(NEXTPNR) --json $< --write $@ --device GW2AR-LV18QN88C8/I7 --vopt family=GW2AR-18C --vopt cst=tangnano20k.cst
 
 %-tangnano20k-synth.json: %.v
 	$(YOSYS) -D LEDS_NR=6 -D OSC_TYPE_OSC -D INV_BTN=1 -p "read_verilog $^; synth_gowin -json $@"
@@ -223,7 +223,7 @@ blinky-pll-tangnano4k-synth.json: pll/GW1NS-4-dyn.vh blinky-pll-vr.v
 	gowin_pack -d GW1N-9C -o $@ $^
 
 %-tangnano9k.json: %-tangnano9k-synth.json tangnano9k.cst
-	$(NEXTPNR) --json $< --write $@ --device GW1NR-LV9QN88PC6/I5 --vopt family=GW1N-9C --vopt cst=tangnano9k.cst
+	$(NEXTPNR) --json $< --write $@ --device GW1NR-LV9QN88PC6/I5 --vopt family=GW1NR-9C --vopt cst=tangnano9k.cst
 
 %-tangnano9k-synth.json: %.v
 	$(YOSYS) -D LEDS_NR=6 -D OSC_TYPE_OSC -D INV_BTN=0 -p "read_verilog $^; synth_gowin -json $@"
@@ -232,7 +232,7 @@ pll-nanolcd-tangnano9k-synth.json: pll/GW1N-9C-dyn.vh pll-nanolcd/TOP.v pll-nano
 	$(YOSYS) -D INV_BTN=0 -p "read_verilog $^; synth_gowin -json $@"
 
 pll-nanolcd-tangnano9k.fs: pll-nanolcd-tangnano9k.json
-	gowin_pack -d GW1N-9C --sspi_as_gpio --mspi_as_gpio -o $@ $^
+	gowin_pack -d GW1NR-9C --sspi_as_gpio --mspi_as_gpio -o $@ $^
 
 # ============================================================
 # szfpga (GW1N-9)
@@ -288,10 +288,10 @@ blinky-pll-runber-synth.json: pll/GW1N-4-dyn.vh blinky-pll.v
 	gowin_unpack -d GW1NS-4 -o $@ $^
 
 %-tangnano9k-unpacked.v: %-tangnano9k.fs
-	gowin_unpack -d GW1N-9C -o $@ $^
+	gowin_unpack -d GW1NR-9C -o $@ $^
 
 %-tangnano20k-unpacked.v: %-tangnano20k.fs
-	gowin_unpack -d GW2A-18C -o $@ $^
+	gowin_unpack -d GW2AR-18C -o $@ $^
 
 %-runber-unpacked.v: %-runber.fs
 	gowin_unpack -d GW1N-4 -o $@ $^