UGH the Pokemon names. I just looked through them and AUGH. I don't think they care about names sounding like other words when spoken though.

Yeah, Ellesse isn't a very common name. Most people know it as an Italian sports brand. But as for pronunciation, my friend always pronounced "Ellesse" as "eh-lees", but looking it up has it reading the same as "Alessa" as well. So I'd imagine pronouncing it similar to "Alessa" probably wouldn't be too far off.