User blog comment:MrHatNClogs/Shinigami origins???/@comment-1454424-20100518065220

I am sorry but I don't understand what you are asking for. Kira, Soifon, Byakuya, Yoruichi, Kaien etc are all known to have been born in Soul Society. They had Shinigami parents, Shinigami grandparents and were not from Rokungai - which is where the Shinigami who were alive at one time or another and came to Soul Society as pulses come from.

There are like a dozen chapter in which these people talk about their family. Of the top of my head, Kira is shown at his parents grave in chapter -17. In addition. Renji when describing his time at the Academy talks about how Shinigami from Seireitei looking down on people from Rokungai. So I am not sure what you are asking for. Indeed, I wasn't even aware that fact that Byakuya, Soifon, Kira and others being born in Soul Society was even up for dispute!