兄弟有英文简称是：bro。

兄弟的英文：brother。词汇解析brother英['brʌðə]美[ˈbrʌðər]n. 兄弟，同胞。

例句：

1、He told reporters he'd come to be with his Latvian brothers. 他告诉记者他是来支持拉脱维亚同胞的。

2、I went to Brooks Brothers and bought myself a decent shirt. 我去布鲁克斯兄弟专卖店给自己买了一件体面的衬衫。