auntie’s sister - Usagi’s parents theory
oh yeah, I remembered what I remembered a few days ago: why I think Auntie has a younger sister that's in the Miyamoto family line, instead of younger brother - because of the whole meaning of Yuichi as it is written, as a given name.
Yuichi Usagi is the first son in a while. Maybe even since Auntie's own grandfather?
So this ties back to the whole "What's in a name" theory post I made a while back, where I connected Senso and Samurai Rabbit.
Because Yuichi spelled as both 雄一 and ユウイチ - Yūichi - means “heroic first (son)” - maybe he was named that bc the family hasn't seen a son in a long time? So by that reasoning, it makes even more sense if Yuichi is more like a title or nickname in this case, but Usagi places it in the same way as he would a family name bc their family didn't have a name for a long time as farmers.
And so, going from that reason, maybe his family line tying him back to Miyamoto Usagi, must be maternal - his mother and grandmother at least, since Auntie mentions his great-grandfather - so for a few generations, the family didn’t have sons at all. Anyway, that’s just a theory I remembered now ^^
As an additional theory/headcanon, maybe even that they were overjoyed to have someone carry a family name but by that time, Neo Edo had changed so much that Miyamoto Usagi had already been branded a traitor in the city, without the family knowing about it. So what do they do? Perhaps they decided not associate with him as openly, to avoid scrutiny because it was hard to change public opinion - and after Usagi’s parents died, Auntie cut off ties from the city entirely. She passes on some of the stories about family history, and Yuichi sticks as a family name to Usagi because that’s the only other name he got. imo, auntie seemed fairly in the dark about how much Neo Edo had changed while she was away from it, so it’s a possibility that the perception about Miyamoto Usagi changed during her lifetime, e.g. after the war she was in.
But that’s backstory we don’t know exactly, so this is just headcanon and fanfic territory for now ^^
Anyway, that’s probably why I headcanon that auntie had a younger sister who’s the parent, because the Yuichi name seemed somehow to tie into this family history for me xD even tho the show itself is slightly vague about it (auntie just says “I promised your parents” it does leave this theory open as a possibility.