And the 17th descendant Yukitoki NISHINOTOIN founded the Nishinotoin family and belonged to the line of the Dojo families (the families who were permitted to enter the palace), however, the Nishinotoin family discontinued a while during the Sengoku Period (Period of Warring States) and was reconstructed later by inviting Tokiyoshi NISHINOTOIN from the Kawabata family as an adopted son.
また17代目の子孫にあたる西洞院行時は西洞院家を興し、西洞院家は堂上家に列したが戦国時代に中絶し、河鰭家から西洞院時慶が養子が入って再興した。