That's how I would spell it, I'm not sure you can make it look any more girly without adding an unneccessary letter y, like Paysyn which looks kind of silly.
There is a Payson on Make it or Break it. (Hmm, should I admit that I watch this?) Anyway, that was the first time I actually heard of the name. I think that spelling is fine.
Re: How would you spell this name?
Paison? No, that looks like poison. Pacein? Pacin? Those look like headache medicines. Hmm.
Personally, I wouldn't even recognize that "Payson" is a name--do you like Peyton?
There is a Payson on Make it or Break it. (Hmm, should I admit that I watch this?) Anyway, that was the first time I actually heard of the name. I think that spelling is fine.
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I'm thinking of words that rhym: Mason, Jason,
Pason?
I like it spelled Payson... but here are some spelling I thought of ( I astericked my favs):
Ella Pacyn
Ella Pascyn*
Ella Paisyn*
Ella Paisynn
Ella Passyn
Ella Passan