Unserious name ideas?! Also thoughts on his breed mix?

For name context: He’s clumsy and goofy and seems like he doesn’t know how to control his limbs yet. He also is the sweetest, most loving, yet cautious/timid thing. Super super super brave, learning and picking up very quickly!

He’s a large mutt that we rescued yesterday, was a stray. 5 months old. No idea what he’s a mix of. Wanting to hear thoughts on that as well if you have any!