A strategic adviser from a cadet branch of this family who led the Wǎgāng Army devised three rebellion strategies for Yáng Xuángǎn to choose from, including a siege of Luòyáng, which ended with a wounded Yáng asking his brother to strike a fatal blow. This family founded the Western Liáng, one of the Sixteen Kingdoms. An alliance that destroyed the Uyghur Khaganate was forged since the Yenisei Kyrgyz Khaganate claimed descent from a Hàn-era general from this family. A powerful governor of the Lǒngxī Commandery from this family used (*) Göktürk support to install the puppet emperor Yáng Yòu before toppling him and establishing a ruling dynasty. Two brothers from this family were ambushed and executed at the Xuánwǔ Gate (10[1])by an emperor (-5[1])who was bestowed the temple name Tàizōng. For 10 points, identify this family name of Táng dynasty rulers. ■END■ (10[1])