Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Old English ead
Proto-Germanic *audaz (inherited)
Proto-West Germanic *aud (inherited)
Old High German ōt (cognate)
Icelandic auður (cognate)
Old Norse auðr (cognate)
Old Saxon ōd (cognate)

English Eda (derived)
Old English Eadgar (compound)
Old English Eadmund (compound)