Where does “ekj” come from?

ekj (Plautdietsch) comes from Middle Low German ik, from Old Saxon ik, from Proto-West Germanic ik, from Proto-Germanic *ek, from Proto-Indo-European éǵh₂ — I.

Ancestry of “ekj”, step by step

Step	Language	Word	Meaning
1	Middle Low German	ik	I
2	Old Saxon	ik	I
3	Proto-West Germanic	ik	I
4	Proto-Germanic	*ek	—
5	Proto-Indo-European	éǵh₂	I

Every word from Proto-Indo-European éǵh₂ →Every word from Proto-Germanic *ek →Every word from Proto-West Germanic ik →