Sayyiduna Abu Hurairah (may Allah be pleased with him) said: The name of Sayyidah Zainab (may Allah be pleased with her) was Barrah (very pious), but the Noble Prophet (peace and blessings of Allah be upon him) changed it to Zainab.
Hadith Referenceسنن دارمي / من كتاب الاستئذان / 2733