Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Icelandic hjú
Proto-Germanic *hīwōn- (inherited)
Proto-Germanic *hīwą (mention)
Old Norse hjú (inherited)
Old Norse hjó (mention)

Icelandic hýr (cognate)
Icelandic skötuhjú (compound)