My DD is 22, her first name is Isabella, I chose the name as I love it and think it’s very pretty. Since she was little I’d always call her Isabella or Bella, her dad who I wasn’t with called her “Isa” (ee-sa).
As a teen she insisted I didn’t call her Bella, I happily just used Isabella.
Now she is insisting I call her Isa, she says she doesn’t like Isabella, no one apart from me has called her it in 10+ years. She also complains I say it wrong anyway (her dad is European and pronounces it ee-sa-bell-a, I say is-a-bell-a). I replied that I can’t say her name wrong as I picked it!!
AIBU to say I will continue to call her Isabella (with the English pronunciation) and not by Isa as that isn’t the name I chose for her and I don’t like it.