This is my first 9-sib BA also. I'm thinking that there might be adoption or blended families involved.
I was surprised to see so many Zac/Zach as full names and not
Zachary or
Zachariah, but I guess I shouldn't have been considering all those
Alfie,
Charlie,
Evie, etc.
BAs.
Glad you like the alphabetical
BAs, I'll continue to do them this way then:-)