Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
French je
Catalan jo (cognate)
Corsican eo (cognate)
German ich (mention)
English I (mention)
Spanish yo (mention)
Old French jo (derived)
Franco-Provençal je (cognate)
Ancient Greek ἐγώ (mention)
Proto-Indo-European *éǵh₂ (derived)
Italian io (mention)
Latin ego (derived)
Norman je (cognate)
Occitan ieu (cognate)
Picard ej (cognate)
Angevin je (cognate)
Bourbonnais-Berrichon je (cognate)
Bourguignon je (cognate)
Champenois ju (cognate)
Franc-Comtois i (cognate)
Gallo je (cognate)
Lorrain je (cognate)
Orléanais je (cognate)
Poitevin-Saintongeais jhe (cognate)
Tourangeau je (cognate)
Russian я (mention)

English j'adoube (mention)
English I think therefore I am (link)
Old English ic (cognate)
French je m'appelle (mention)
French j'ai (compound)
French chu (compound)
French je ne comprends pas (mention)
French égo (doublet)
Latin cogito, ergo sum (link)
Romanian va (mention)
Bourguignon i (cognate)
Sardinian eo (cognate)