Brainin (�������, also Brainen, Brajnin, Braynen, Breinin) is Russian-Jewish surname. It may refer to:
b ɹ eɪ n ɪ n WORD_BOUNDARY ɔ l s oʊ WORD_BOUNDARY b ɹ eɪ n ə n WORD_BOUNDARY b ɹ æ d̠ʒ n ɪ n WORD_BOUNDARY b ɹ eɪ n ə n WORD_BOUNDARY b ɹ eɪ n ɪ n WORD_BOUNDARY ɪ z WORD_BOUNDARY ɹ ʌ ʃ ə n d̠ʒ uː ɪ ʃ WORD_BOUNDARY s ɜː n eɪ m WORD_BOUNDARY ɪ t WORD_BOUNDARY m eɪ WORD_BOUNDARY ɹ ɪ f ɜː WORD_BOUNDARY t uː WORD_BOUNDARY