姬姓为春秋时鲁国叔牙之后以排行为氏。据《姓谱》载春秋时鲁桓公的第三子叔牙名牙排行叔死后谥僖亦称公子牙、僖叔其子立为叔孙氏。叔牙的两个孙子：彭生、德臣。彭生便以叔仲为氏；德臣以叔孙为氏其后人遂以叔孙为姓称为叔孙氏。帮我翻译下

"Ji" is a surname derived from the descendants of Shuya, a nobleman of the state of Lu during the Spring and Autumn period, who took his rank as his surname. According to the "Book of Surnames", Shuya was the third son of Duke Huan of Lu during the Spring and Autumn period. His name was Ya, and his rank was "Uncle". After his death, he was posthumously named Xi and was also called Gongzi Ya or Xi Shu. His son was established as the Shusun family. Shuya's two grandsons were Pengsheng and Dechen. Pengsheng took "Shuzhong" as his surname, and Dechen took "Shusun" as his surname. Therefore, their descendants took "Shusun" as their surname and were called the Shusun family.