Al-Adab Al-Mufrad #834
Names
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
حَدَّثَنَا عَمْرُو بْنُ مَرْزُوقٍ، قَالَ: حَدَّثَنَا شُعْبَةُ، عَنْ عَطَاءِ بْنِ أَبِي مَيْمُونَةَ، عَنْ أَبِي رَافِعٍ، عَنْ أَبِي هُرَيْرَةَ قَالَ: كَانَ اسْمُ مَيْمُونَةَ بَرَّةَ، فَسَمَّاهَا النَّبِيُّ صلى الله عليه وسلم مَيْمُونَةَ.
Abu Hurayra said, "Maymuna's name was Barra and then the Prophet,
may Allah bless him and grant him peace, renamed her Maymuna."
About Al-Adab Al-Mufrad
This hadith is #834 from Al-Adab Al-Mufrad, in the Book of Names.