Nobukatsu is said to have hosted the funeral of a member of the Ikoma clan under the name of Chasen-maru, his name before genpuku (the celebration of one's coming of age), which would normally be not appropriate, where Nobutada also issued his signature under his pre-genpuku name, Kimyo-maru, from which it can be surmised that Kimyo-maru hosted the funeral of Keiju KYUAN in June of 1571 as she was the real mother of Nobutada.
生駒氏の喪主を信雄が元服前の茶筅丸のまま務めたとされているが、同じように、通常は判物を出せない元服前の奇妙の名で出していることからも、奇妙丸が元亀2年（1571年）6月に久庵慶珠の葬儀の喪主を務めたと考えられ、この久庵慶珠こそ信忠の生母だと推測できるのではないだろうか。