Where does “Schlätje” come from?

Schlätje (Plautdietsch) comes from Dutch -kje, from Middle Low German -eken, from Old Saxon -kīn, from Proto-West Germanic *-ukīn.

Ancestry of “Schlätje”, step by step

StepLanguageWordMeaning
1Dutch-kjeAlternative form of -tje
2Middle Low German-eken—
3Old Saxon-kīn—
4Proto-West Germanic*-ukīn—
Every word from Proto-West Germanic *-ukīn →Every word from Dutch -kje →Every word from Middle Low German -eken →