No, they are not related. Just have the same last name.
no
Just because two people have the same last name doesn't always mean that they're related.
NO
no mariah is the only celeb in her family however her mother was once a opera singer in her youth and has done a few interviews alongside mariah
Lowering the American Drinking Age
Gustavo Arellano on Mexicans in the US
Mariah Carey - It's a Boy…and a Girl!
How to Play Without You by Mariah Carey on the Piano - Part 1