User blog comment:B214/Question and Answers 6/@comment-90.202.240.151-20161015193457/@comment-27083298-20161015203015

If you want to make reference on Issei's children then go here

http://highschooldxd.wikia.com/wiki/User_blog:Ariel_Saeba/Mythology_and_Character_Origins_in_DxD?useskin=oasis