When DS was born we wanted to give him a similar sounding name (Sofian). But everyone told us it's sounds a bit 'wussy' and soft for a boy's name. I still love the name and wish I didn't listen to others.
Florian is the only one I recognise as a name (and it's a very old-fashioned, pretty much fallen out of use name). If I saw Florim I'd assume it was spelled wrong. Florent I'd assume was a foreign name. And, as someone else said, a florin is a coin.