Abu Hatim ibn Hibban al-Busti: He mentioned him in "al-Thiqat" and said: "He was among the most knowledgeable of people in genealogy, the days of the people and the events that happened among them."
Abu Zar'ah ad-Dimashqi: Illustrious
Abu Muhammad ibn Hazm az-Zahiri: He is not famous in Hadith nor is he described as having memorized it, but he is only knowledgeable in poetry, history and genealogy.
Ahmad ibn Hanbal: Mustathbat (Reliable)
Ahmad ibn Musa ibn Mardawayh: Thiqah (Trustworthy)
Ibn Hajar al-'Asqalani: Saduq (Truthful) knowledgeable in genealogy
al-Daraqutni: Thiqah (Trustworthy)
al-Dhahabi: Thiqah (Trustworthy), criticized for his Waqf (endowment)
al-'Abbas ibn Musaab al-Marwazi: I met him in Baghdad and he was the most knowledgeable Qurayshite in genealogy
Muslamah ibn al-Qasim al-Andalusi: Thiqah (Trustworthy)
The authors of Tahrir Taqrib al-Tahdhib: Thiqah (Trustworthy), and we do not know of any reliable criticism against him
Yahya ibn Ma'in: Thiqah (Trustworthy), and once: He was knowledgeable in genealogy