They may have half brothers or sisters. In the immediate family, however, it is just them, mum, dad, and step-parents.
They have one younger brother named Frankie who was born septemeber 2000.
Yes, Nick Jonas has diabetes
There's four boys in their family. Kevin, Joe, Nick, and Frankie.
yeahhh ummm nick has been out wiv Miley Cyrus, Selena Gomez, etc Kevin is married i think and joe has been out with Taylor swift, demi lovato ,etc :))