杜如晦
Du Ruhui was born in 585, during the reign of Emperor Wen of Sui. He was from the Du clan of Jingzhao, which came from the region around the capital Chang'an. His great-grandfather Du Jiao () and grandfather Du Hui () were both officials for Sui's predecessor state Northern Zhou, and his granduncle Du Guo () or Du Gao () was particularly well-regarded during Sui. His father Du Zha () was a provincial secretary general during Sui. Du Ruhui had at least one older brother, whose name is lost to history, and one younger brother, Du Chuke ().