Sounds made up. Also is distinctly associated with celebrity Charlize Theron who I think sort of owns this name (similar to Beyonce and Ariana for Ariana Grande)
Full disclosure: I actually *really like* this name. In fact I prefer it to Charlotte! However, it's so utterly connected to a particular person (Charlize Theron) outside of South Africa that using it in real life would look like you're naming your daughter specifically after her. And she's not a problematic person; but from the outside you run the risk of people judging you as shallow because you "named your kid after a celebrity." Of course neither assumption would be true, and it would say more about the judgers than anyone else. But it's an obstacle to consider.