in some areas in the us (particularly where i live - st. louis, mo) "louis" is pronounced the same way as "lewis". hence why i combined them. this quiz is about american names, after all. luis is pronounced closely enough to "louis" (pronounced the french way) to be combined with it. in that case, though, i am mainly going off of precedent set by other baby name quiz makers who have been active a lot longer than me. mateo and matthew are not pronounced similar enough or even recognized as names with the same origin by lots of americans. same with josue and joshua. or juan and john or michael and miguel or stephen and esteban. if i combined all of these, it would be a much shorter quiz.