It is narrated from Sayyiduna Abd al-Rahman bin Samurah (may Allah be pleased with him) that he said: "In the time of Jahiliyyah my name was 'Abd Kulal', then the Prophet (peace and blessings be upon him) named me 'Abd al-Rahman'."
This hadith is narrated from Ammar bin Abi Ammar, from Sayyiduna Abd al-Rahman bin Samurah (may Allah be pleased with him), only with this chain, and Abu Ubaydullah bin Hilal (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب الميم / 7248
Hadith Gradingمحدثین:إسناده ضعيف لضعف ناصح أبي العلاء
Hadith Takhrij«قال الهيثمي: فيه ناصح أبو العلاء وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 8، ص 55»»