Question: Who is the paternal grandfather of King Wen Of Chu?
Answer: Xiao'ao

King Wu of Chu (Chinese: 楚武王, died 690 BC) was the first king of the State of Chu during the Spring and Autumn period of ancient China. He was the second son of Xiao'ao, and brother of former ruler Fenmao whom he is rumored to have murdered in 740 BC in order to usurp the throne. He was also the first ruler among Zhou's vassal states to style himself "king"; Chu was one of a few states whereby its rulers declared themselves kings during the Spring and Autumn period