Where does “ick/ik” come from?

ick/ik (Low German) comes from Proto-Germanic ek, from Proto-Indo-European éǵh₂ — I.

Ancestry of “ick/ik”, step by step

StepLanguageWordMeaning
1Proto-GermanicekI
2Proto-Indo-Europeanéǵh₂I
Every word from Proto-Indo-European éǵh₂Every word from Proto-Germanic ek