Where does “Schwiegervater” come from?
Schwiegervater (German) comes from German schwieger-, from German Schwieger, from Middle High German swiger, from Old High German swigar, from Proto-West Germanic *swegru, from Proto-Germanic swegrō, from Proto-Indo-European sweḱrúh₂, from Proto-Indo-European swéḱuros — father-in-law.
Schwiegervater (German): father-in-law
Ancestry of “Schwiegervater”, step by step