I personally really like it. And it's not too strange, the "-ander" ending is well known through the popular name
Alexander, so it
shouldn't be received too negatively, but as with all names that people are not familiar with there will always be some who ridicule it.
I'd prefer
Leander in the first name spot to
Felix, but this is just because I associate
Felix so strongly with cats that I couldn't see it on a human. The fluidity of the combo remains good in both cases.