There are many women's clothing brands that begin with the letter B. Here are some of them for your reference:

BURBERRY, BALENCIAGA, BALMAIN, BOTTEGA VENTA, BILL BLASS, BIBA, BAIKALI, Baleno Attitude Rainbow, BEALOVEE, BIFT Series, BORUIDESI, BELANTE Beirante, Bao Li Bao Li, BEEOW, BROTOR, BEFUEICE Bufan, Bravo Girl, BGTHREE, Boris Fashion, BEE BY HEBEECO, BAISONGZI, B.SEAS Beth, BAIGELI Baigeli, BASLER, Little Angel,