Comment by thaumasiotes
2 days ago
Well, wiktionary does call them cognates, if you follow the links around.
Old English swige < proto-West-Germanic swiga ; German schweigen < proto-West-Germanic swigen < swiga
(Following the links around on wiktionary may, in general, lead to self-contradictory results.)
In Limburgs, still today: Zwieg!: Shut up, zwiegen: Not saying anything.