Middle name help!!

My fiancé is in love with the name Isabella and so am I. However we can’t decided on a middle name! We like Rae after his grandmother that recently passed away but I don’t want our baby girls initials to be I.R.S with his last name being See. My fiancé thinks that it is funny and doesn’t see a problem with it. What do y’all think sounds better?? Please help. Thank you in advanced 💖

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