Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Dutch Aa
German Aa (cognate)
English ea (cognate)
Proto-Germanic *ahwō (inherited)
Old High German aha (cognate)
Proto-Indo-European *h₂ekʷeh₂ (derived)
German Low German Aa (cognate)
Dutch Low Saxon Aa (cognate)
Old Saxon aha (cognate)