Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Old Norse ek
← Proto-Germanic *ek (inherited)
← Proto-Norse ᛖᚲ (inherited)
← Proto-Indo-European *éǵh₂ (inherited)

→ Old English ic (cognate)
→ Danish jeg (derived)
→ Middle English ik (cognate)
→ Faroese eg (inherited)
→ Gutnish ja (inherited)
→ Old Danish iegh (inherited)
→ Old Swedish iak (mention)
→ Old High German ih (cognate)
→ Icelandic eg (inherited)
→ Icelandic ek (inherited)
→ Icelandic ég (derived)
→ Jutish æ (derived)
→ Latvian es (cognate)
→ Norwegian Bokmål jeg (derived)
→ Norwegian Nynorsk eg (inherited)
→ Norwegian Nynorsk I (inherited)
→ Norn eg (inherited)
→ Old Frisian ik (cognate)
→ Old Saxon ik (cognate)
→ Old Saxon ic (cognate)
→ Elfdalian ig (derived)
→ Pennsylvania German ich (cognate)