 He was a son of his predecessor Yax Nuun Ahiin I and Lady Kʼinich, and a grandson of Spearthrower Owl.Stela 31, erected during his reign, describes the death of his grandfather in 439; other monuments associated with Sihyaj Chan Kʼawiil II are Stelae 1 and possibly Stelae 28.Tikal Temple 33 was Sihyaj Chan Kʼawiil II's funerary pyramid and his tomb was located beneath it.