Where does “leder” come from?

leder (Middle Low German) comes from Old Irish lethar, from Proto-West Germanic *leþr, from Proto-Germanic leþrą, from Proto-Celtic ɸlitro-, from Proto-Indo-European pl̥tro-.

Ancestry of “leder”, step by step

StepLanguageWordMeaning
1Old Irishletharskin; leather, hide
2Proto-West Germanic*leþrleather
3Proto-Germanicleþrąleather
4Proto-Celticɸlitro-—
5Proto-Indo-Europeanpl̥tro-—
Every word from Proto-Indo-European pl̥tro- →Every word from Proto-Celtic ɸlitro- →Every word from Proto-Germanic leþrą →