This Hadeeth ( Al-Mahdi's name is the same name of the Prophet and his Kunya is the same Kunya of the Prophet ) is narrated in many Shia and Sunni books. These are few Sunni books:
1. Sunan Al-Tirmithi, V. 3, P.343.
2. Al-Mo'jam al-Awsatt by al-Tabarani , V.8, P. 178.
3. Al-Mustadrak 'ala al-Saheehayn by al-Haakim al-Nisaboori .
And many others.