sentences:  His clan became an honored one, as his younger brother Yang Shidao married Emperor Gaozu's daughter Princess Guiyang; his niece was wife and princess of Li Yuanji and later became a favorite concubine of Emperor Taizong; and his nephew Yang Sijing (楊思敬) married another daughter of Emperor Gaozu, the Princess Anping.Yang died in 639.He was given posthumous honored and buried near the tomb of Emperor Taizong's wife Empress Zhangsun, which would eventually become Emperor Taizong's tomb as well.