User blog comment:Lord Loss/Monster Hunter Frontier G 2 Discussion/@comment-16119585-20130911170756/@comment-969093-20130911175115

ゼルレウス (zerureusu) is basically the same as Rathalos' original name with the beginning being different.

Rathalos = リオレウス (Rioreusu)

Zerulos = ゼルレウス (Zerureusu)

I can see that name turning out Zeralos or something along those lines if it would be translated. But that will never happen.