The Jonas brothers last name is Jonas!
Jonas is the last name of the Jonas Brothers, and it is their real last name.
well there last name is Jonas and they are brothers
Well they are brothers and their last name is Jonas.
go on www.wikipedia.org and type Jonas brothers and that's their real last .name
Their last names are Jonas
They got their name coz Their last name is Jonas and they are all brothers so put them together and you get : Jonas Brothers
Because their last name is Jonas and they are Brothers. That makes the Jonas Brothers.
Jonas
It is the Jonas Brothers last name, that's why!
There last name?..It's Jonas
Because the musical group consists of Kevin, Joe, and Nick Jonas, and they are brothers. It was a convinient name to use; they thought of The Jonas Trio; Jonas 3; and Sons Of Jonas; but the Jonas Brothers was the most reasonable.