Just a thought, since you said you hadn't come up with his middle name yet:
St. Francis of Assisi's christened name was Giovanni Francesco Bernardone. Maybe there is something there to be adapted to Jonah's middle name -- a bond with Francis
For example, follow Giovanni (meaning "God is Gracious") back: Giovanni | Name Meaning & Origin | Boy Name Giovanni | Baby Names World
St. Francis of Assisi's christened name was Giovanni Francesco Bernardone. Maybe there is something there to be adapted to Jonah's middle name -- a bond with Francis
For example, follow Giovanni (meaning "God is Gracious") back: Giovanni | Name Meaning & Origin | Boy Name Giovanni | Baby Names World