Ariana Grande's brother's name is Frankie Grande. He is a singer, actor, dancer, and YouTube personality.
Frankie Grande is the son of Joan Grande and Edward Butera. He is the half-brother of Ariana Grande, and is 11 years her senior. He has appeared in various Broadway productions, and is a popular YouTuber. He also competed on the US version of the reality TV show "Big Brother" in 2014.