Where does “sōbrīnus” come from?
sōbrīnus (Latin) comes from Proto-Italic swezrīnos, from Proto-Italic swezōr, from Proto-Indo-European swésōr, from Proto-Indo-European su-h₁ésh₂-ōr, from Proto-Indo-European h₁ésh₂r̥ — blood.
Ancestry of “sōbrīnus”, step by step