Summarizing these family records, Sadayasu had five sons, Sadamune, Yoshitsuna, Sadahisa, Sadakuni, and Muneyasu, and the Iyo-Utsunomiya family records state that Sadamune, who as his eldest became the Governor of Iyo Province, whereas the Shimotsuke-Utsunomiya family records and others state that Yoshituna, who was adopted by the Buzen-Utsumoniya clan, was his eldest.
それらをまとめれば、貞泰には、貞宗、義綱、貞久、貞邦、宗泰という子があり、伊予宇都宮系図は、伊予国守護となった貞宗を長子としているが、下野宇都宮系図その他では、豊前宇都宮氏に入嗣した義綱を長子としている。