Lǐ Yuán bà (李元霸) (599年－614年) was Tang Gaozu's fourth son, courtesy name Dàdé (大德). He was born by Lady Dou. He died in 614 after being struck on the head by his own weapon. After the establishment of Tang dynasty he was posthumously created Prince Huai of Wei. He died sonless, so Li Tai, son of his elder brother Li Shimin, was created his heir as Prince of Qing.When Li Shimin became emperor, he renamed Li Tai as his own son and created another clansman Li Baoding as heir to Li Yuanba. After Baoding died, also sonless, the Principality of Wei was cancelled.

李玄霸（599年 - 614年），字大德，唐高祖李渊第三子，获封为卫怀王。隋朝大业十年（614年）逝世，传因意外落马而亡，得年十六，并无儿女。

《新唐书·列传第四·高祖诸子》卫怀王玄霸字大德。幼辩惠。隋大业十年薨，年十六，无子。武德元年，追王及谥，又赠秦州总管、司空。

后来以其二哥秦王李世民第四子李泰做其后嗣。李世民继位为唐太宗后，李泰作为皇子回归本宗，改封为越王，唐太宗改以西平王李琼之子李保定过继为李玄霸的后嗣，李保定死而无子，玄霸这一支的封国也就正式被削除了。

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