Japanese Family Crest:
https://en.wikipedia.org/wiki/Mon_(emblem)
https://ja.wikipedia.org/wiki/家紋
I'm not sure about Azai Clan things. It seems even commoners including merchants and farmers had their family crests already in Edo period. Except for some crests for high ranks such as royal family, which was prohibited for others to use, I don't think there was any strict authority to control other ones. Actually, my parents' family crest is
Chigai Takanoha (Crossing pair of hawk feathers) and their ansestors were farmers for generations, and my husband's family crest is
Daki Myoga (Pair of Japanese gingers), and he says his ansectors were Shinto priests, but I have never seen any evidence such as a pedigree so far
Hanyu family might be related to Azai Clan, but it might not be. They may have something to tell their family history, but I don't know.
And, sorry this might be too much just for a pun said by Yuzuru, but in case there is anyone interested :cool14:
Honno-ji Incident:
https://en.wikipedia.org/wiki/Honnō-ji_incident