Jonah Marais Roth Frantzich (born 16 June 1998) is a member of pop boyband Why Don’t We alongside Daniel Seavey (who appeared on the 14th season of the American Idol), Corbyn Besson, Jack Avery, and Zach Herron. Before joining the group, he has released one EP titled When The Daylight’s Gone, including hits such as “War Paint” and “Take You Home Tonight.” In 2015, Jonah was part of the 2015 DigiTour, which consisted of the biggest Vine and Youtube stars in the United States, including Jack & Jack.

Alongside his fellow band members, Jonah has produced hits “Something Different,” “These Girls,” “Trust Fund Baby” alongside five EPs. Their debut album 8 Letters was released on August 31st, 2018.