Where does “mortmayn” come from?

mortmayn (Old French) comes from Old French mortes meins, from Latin mortua manus, from English manus, from Latin manus, from Proto-Italic manus, from Proto-Indo-European man- — human being; man; hand.

Ancestry of “mortmayn”, step by step

StepLanguageWordMeaning
1Old Frenchmortes meins
2Latinmortua manus
3EnglishmanusA hand, as the part of the fore limb below the...
4Latinmanushand; bravery, valor; violence, fighting
5Proto-Italicmanushand
6Proto-Indo-Europeanman-human being; man; hand
Every word from Proto-Indo-European man-Every word from Proto-Italic manusEvery word from Latin manus