The only free and comprehensive online etymological dictionary of the Spanish language
pelo m. (Noun) "hair"
12th cent. From Latin pilus 'id.' Of unknown origin. Perhaps borrowed from a non-Indo-European language.
Indo-European
Romance
ASturian pelu, Portuguese pelo, Galician pelo, Catalan pèl, French poil, Italian pelo, Aromanian per, Romanian păr, Sardinian pilu
Italic
Latin pila "ball," compilare "to steal"