The only free and comprehensive online etymological dictionary of the Spanish language
fraile m. (Noun) "friar"
12th cent. Old Spanish ffrayre, later fraile, friare. Borrowed from Old Occitan fraire "brother," from Latin frater. From Proto-Italic *frāter- 'id.' From Proto-Indo-European*bhréh2-tr- 'id.'
Indo-European
Italic
Oscan fratrúm, Umbrian fratrum, Venetic hraterei
Celtic
Old Irish bráthair, Welsh brawd
Germanic
Gothic broþar, Old Norse bróðir, Old High Geman bruoder, Old Saxon brōthar, Old English brōðor (English brother)
Balto-Slavic
Old Church Slavonic bratrъ, Old Prussian brāti, Lithuanian brólis, Latvian brãlis
Hellenic
Ancient Greek φρᾱ́τηρ (phráter) "fraternal member"
Phrygian
Phrygian βρατερε (bratere)
Armenian
Armenian eɫbayr
Indo-Iranian
Sanskrit bhrā́tar-, Avestan brātar-
Tocharian
A pracar, B procer