Complex sentence: The Yusupov family is a family of Russian nobleman descended from the Khans of the 10th century and was accounted for its immense wealth in the 19th century, one of the family member Prince Felix Yussupov Jr. was famous for its involvement in the murder of Rasputin.
Split into simpler sentences: The Yusupov family is a family of Russian nobility descended from the Khans of the 10th century and was renowned in the 19th century for its immense wealth. One of the family member, Prince Felix Yussupov Jr., was famous for its involvement in the murder of Rasputin.