Etymology
[ "Em ] (noun suffix.) Middle English eam, eme (“uncle”) from Old English ēam from Proto-Germanic *awun-haimaz (“maternal uncle”) from Proto-Germanic *awōn-, *awēn- (“grandmother, father, uncle”) from Proto-Indo-European *awo- (“grandfather, adult male other than one's father”). Akin to Old Frisian ēm (“uncle”), Middle Dutch oom (Modern Dutch oom (“uncle”)), Old High German ōheim (German Oheim, Ohm (“uncle”)), Latin avus (“grandfather”).