As Hirotsuna's younger brother-in-law, Aritsuna, who became a husband of MINAMOTO no Yoshitsune's daughter, Aritsuna consistently acted together with Yoshitsune, and for this reason, Aritsuna was forced to kill himself by Yoritomo.
広綱の義弟である有綱は源義経の婿となって終始義経と行動を共にしたため、頼朝によって自害に追い込まれた。