Board Thread:General Discussion/@comment-35967431-20180827191912/@comment-1038387-20180828205536

Claes is just a variant of Nicholas, just like Claus is. It doesn't necessarily mean anything. A reverse image search listed no results other than one Swedish message board. For all we know it's some Swedish movie. Or TV series. Or something else entirely.

Also, in what context do you want to use it? Because it's probably not Fair Use.