Etymology

From Proto-Iranian (compare Persian برادر ‎(barâdar), Balochi برات ‎(barát), Kurdish birader, Avestan 𐬠𐬭𐬁𐬙𐬀𐬭 (brātar-)), from Proto-Indo-Iranian *bʰrā́tar- (compare Sanskrit भ्रातृ ‎(bhrātṛ), Hindi भ्राता ‎(bhrātā)), from Proto-Indo-European *bʰréh₂tēr (compare Russian брат ‎(brat), Latin frāter, Irish bráthair, English brother).