Where does “swiger” come from?

swiger (Old High German) comes from Proto-Germanic swegrō, from Proto-Indo-European sweḱrúh₂, from Proto-Indo-European swéḱuros — father-in-law.

Ancestry of “swiger”, step by step

StepLanguageWordMeaning
1Proto-Germanicswegrōmother-in-law
2Proto-Indo-Europeansweḱrúh₂mother-in-law
3Proto-Indo-Europeanswéḱurosfather-in-law
Every word from Proto-Indo-European swéḱuros →Every word from Proto-Indo-European sweḱrúh₂ →Every word from Proto-Germanic swegrō →