Favourite spelling of the name Beau

[mummarichardson]

Just found out we are having a girl, our favourite name is Beau but I am stuck on the spelling as since Beau has become more popular as I know a few boys called Beau and that spelling feels more like a boys name to me.

I really like Bo but husband hates the fact that when she spells it, she will have to say B O as in 'I have bad BO'. Do get his point to be fair.

Then there is Bow but to me that just looks like an object rather than a name.

Which do you think is best?

If it helps, in the TV series Black-ish, the mum is called Rainbow - and Bow for short.

As a French speaker I think Beau sounds pretty odd, as it's mainly used as a masculine adjective (e.g. un beau bébé). French lessons/holidays could be interesting. Up to you though, obviously!