His name will remain Yamanaka, unless Sai's last name is discovered. He takes on his father's pasty-white skin and his mother's hair. He is rather obedient and it is assumed that he will be teamed up with Shikadai Nara and Chouchou Akimichi when he graduates from the academy.
Mother - Ino Yamanaka
Father - Sai
Grandparents - Ino's Mother, Inoichi Yamanaka (Deceased)