I too love the name
Mariah. It just sounds so nice. I do think the
Mariah Carey association is quite strong, but if you really like the name, then I wouldn't let that put you off it. I like all three combos you had, my fave would be
Mariah Bethany though. Here are a few more combo ideas:
Mariah JaneMariah StephanieMariah PearlMariah DaisyMariah LilyMariah SadieMariah ChloeMariah DanielleMariah GwendolynMariah FelicityMariah KatherineMariah PaigeMariah ElizabethMariah EveMariah TessMariah Gabrielle