Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Low German an
Proto-Germanic *an (inherited)
Proto-Germanic *ana (mention)
Middle Low German an (inherited)
Old Saxon an (inherited)
Old Saxon ana (mention)

English on (cognate)
West Frisian oan (cognate)
Low German ankamen (prefix)
Low German anwrümmeln (prefix)