[name_m]Jonah[/name_m] or [name_m]Jonas[/name_m]? Which do you prefer and WHY? What image does each name give you?
I prefer [name_m]Jonas[/name_m].
Had to add that Jonas does not make me think of the Jones Brothers. Jonas has a long history. I would not let a band that was around for a few years ruin it. If we all let celebrities, groups, etc ruin names, there would be no names to use. Every name can be traced to some celebrity or group.
[name_m]Jonah[/name_m] by a landslide!
I associate him with his meaning “dove” which makes me think of the other gorgeous names with the same meaning, [name_f]Paloma[/name_f], [name_u]Columba[/name_u], [name_f]Jemima[/name_f], [name_m]Callum[/name_m]… Feels very gentle and serious to me, two of my favourite qualities in boys names 
[name_m]Jonas[/name_m] is the [name_m]Jonas[/name_m] Brothers for me. Feels bratty and self-centered, juvenile.
I really like both. [name_m]Jonah[/name_m] is very manly yet sweet. For me, [name_m]Jonas[/name_m] has a modern flair like [name_u]Hudson[/name_u], [name_u]Sawyer[/name_u], and [name_u]Everett[/name_u].
[name_m]Jonah[/name_m] for me. Not sure I can articulate why. No imagery comes up for me for [name_m]Jonas[/name_m], while [name_m]Jonah[/name_m] feels totally versatile and approachable.