Sorry but I really really dislike
Sydney on a girl, I find it tacky and awful - one of the unisex names that I would hate to see on a female. When I was a kid
Sydney was my all-time favourite boys name and therefore I can't see it in any other way.
Sidney looks dated on either sex but I would prefer it on a girl than
Sydney.
Then there's always
Sidonie, for a similar sounding name?