Li Xuanba
Li Xuanba, courtesy name Dade, posthumous name Prince Huai of Wei, was the third son of the Emperor Gaozu of Tang. His mother was Lady Dou. He died in 614, before his father founded the Tang dynasty, after being struck on the head by his own weapon. He died sonless, so Li Tai, son of his elder brother Li Shimin, was created his heir as Prince of Yingdu in 621. When Li Shimin became emperor, he re-designated Li Tai as his own son and created another clansman Li Baoding as heir to Li Xuanba. After Baoding also died sonless in 631, the Principality of Wei was abolished.