Where does “mortua manus” come from?

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

Ancestry of “mortua manus”, step by step

mortua manus traces back through two separate lines of ancestry.

via English manus

StepLanguageWordMeaning
1EnglishmanusA hand, as the part of the fore limb below the...
2Latinmanushand; bravery, valor; violence, fighting
3Proto-Italicmanushand
4Proto-Indo-Europeanman-human being; man; hand

via Latin mortuus

StepLanguageWordMeaning
1Latinmortuusdead, having died; decayed, withered; faint,...
2Proto-Italicmortwosdead
3Proto-Indo-Europeanmr̥twósdead
4Proto-Indo-Europeanmer-to die; to disappear; sea, lake, wetland

Words derived from “mortua manus

Every word from Proto-Indo-European man-Every word from Proto-Italic manusEvery word from Latin manus