Where does “sibling-in-law” come from?

sibling-in-law (English) comes from English sibling, from Old English sibling, from Old English -ling, from Old English lang, from Proto-West Germanic lang, from Proto-Germanic langaz, from Proto-Indo-European dlongʰos — long.

sibling-in-law (English): A relative of one's generation, separated by one degree of marriage

Definitions

  1. A relative of one's generation, separated by one degree of marriage

Ancestry of “sibling-in-law”, step by step

sibling-in-law traces back through two separate lines of ancestry.

via English sibling

StepLanguageWordMeaning
1EnglishsiblingA person who shares a parent; one's brother or...
2Old Englishsiblingrelative, kinsman
3Old English-lingadverbial suffix denoting direction, state or...
4Old Englishlanglong; lasting; old, ancient; advanced
5Proto-West Germaniclanglong
6Proto-Germaniclangazlong
7Proto-Indo-Europeandlongʰoslong

via English in-law

StepLanguageWordMeaning
1Englishin-lawA relative by marriage (or through affinity)
2English-in-lawRelated through marriage
3Englishmother-in-lawThe mother of one's spouse; A mother-in-law...
4Middle Englishmoder in lawemother-in-law

Words derived from “sibling-in-law

Every word from Proto-Indo-European dlongʰosEvery word from Proto-Germanic langazEvery word from Proto-West Germanic lang