The word(s) "brother" appears 64 time(s) in 55 verse(s) in Quran in Muhammad Pickthal translation.

(31) They said: Is it indeed thou who art Joseph? He said: I am Joseph and this is my brother. Allah hath shown us favour. Lo! he who wardeth off (evil) and endureth (findeth favour); for lo! Allah loseth not the wages of the kindly.

(32) Lo! the squanderers were ever brothers of the devils, and the devil was ever an ingrate to his Lord.

(33) And We bestowed upon him of Our mercy his brother Aaron, a prophet (likewise).

(34) Aaron, my brother.

(35) Go, thou and thy brother, with My tokens, and be not faint in remembrance of Me.

(36) Then We sent Moses and his brother Aaron with Our tokens and a clear warrant

(37) And tell the believing women to lower their gaze and be modest, and to display of their adornment only that which is apparent, and to draw their veils over their bosoms, and not to reveal their adornment save to their own husbands or fathers or husbands' fathers, or their sons or their husbands' sons, or their brothers or their brothers' sons or sisters' sons, or their women, or their slaves, or male attendants who lack vigour, or children who know naught of women's nakedness. And let them not stamp their feet so as to reveal what they hide of their adornment. And turn unto Allah together, O believers, in order that ye may succeed.

(38) No blame is there upon the blind nor any blame upon the lame nor any blame upon the sick nor on yourselves if ye eat from your houses, or the houses of your fathers, or the houses of your mothers, or the houses of your brothers, or the houses of your sisters, or the houses of your fathers' brothers, or the houses of your fathers' sisters, or the houses of your mothers' brothers, or the houses of your mothers' sisters, or (from that) whereof ye hold the keys, or (from the house) of a friend. No sin shall it be for you whether ye eat together or apart. But when ye enter houses, salute one another with a greeting from Allah, blessed and sweet. Thus Allah maketh clear His revelations for you, that haply ye may understand.

(39) We verily gave Moses the Scripture and placed with him his brother Aaron as henchman.

(40) They said: Put him off, (him) and his brother, and send into the cities summoners