Do these names sound ridiculous...?

I'm writing a book about four friends (two boys and two girls) who form a band and I wanted to give them all music related names. I was going to name the first girl Aria, which means gentle music. I think the second girl will be Lyric. She has two parents who are in the music Business and gave her a musical name. The two boys are harder but I finally decided on Jerron (Jerry) meaning cry of rejoicing or song, and Harper. Do these names sound completely unrealistic and stupid, or are they all right? Need opinions!