I like both, but I'd pick Jonathan at gunpoint - it's more down to earth. Jonathan Ambrose and Nathaniel... Cleopas???? No but seriously maybe Nathaniel Charles... Nathaniel Levi? Nathaniel James? None of these are completely satisfying.
masculine list:
https://www.behindthename.com/pnl/191050/124079feminine list:
https://www.behindthename.com/pnl/191050/124080