Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Mòcheno oa's
Cimbrian òas (cognate)
German eins (cognate)
English one (cognate)
Proto-Germanic *ainaz (derived)
Middle High German ein (derived)
Proto-West Germanic *ain (derived)
Old High German ein (derived)