Tommi for a girl name-please read description

Ive always loved the name Tommi for a girl, at first my fiance wasnt too keen but over time hes expressed how much he loves the name! However one of his younger brothers is called Tommy. We wouldn’t be naming her after his brother as its just a name we both like but would it seem weird?! I know people name their kids after them but is it ok to copy a name?

Im not entirely sure how his brother feels as its not something we have discussed with him yet?!