Honestly, why?
One of my dc has a slightly unconventional spelling as a nod to her paternal great grandmother (xh's idea).
So something like Johanna to reflect great grandma being a Jehan, but not quite that.
It's one letter difference, & to be honest I rather like the spelling, but teenage dd is already chuntering that she has to constantly check that the 'h' is there every time she fills in a form or gives her name over the phone.
It's a lifelong pain in the arse for her to have to keep telling people the equivalent of 'yes it's Joanna, but with an h, no, not at the end, after the Jo bit'.
I wouldn't do it just to be yooonike, put it that way.