Well, wiktionary does call them cognates, if you follow the links around. Old English swige < proto-West-Germanic swiga ; German schweigen < proto-West-Germani

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.)