Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Celtic *blēdanī

→ Breton bloaz (inherited)
→ Welsh blwyddyn (inherited)
→ Welsh blwydd (inherited)
→ Welsh eleni (mention)
→ Irish bliain (inherited)
→ Scottish Gaelic bliadhna (inherited)
→ Manx blein (inherited)
→ Cornish bledhen (inherited)
→ Old Irish blíadain (inherited)