If one didn't know what it said, that's a big possibility… especially given that his wife played Nami in the musicals originally. It would make sense for her to be in the forefront.
He'd never do anything so narcissistic.
He drew it for his editor at the time (Habuta if I recall correctly) when he had a girl.
Habuta was a fucking awesome editor. He backed Oda 110% in his vanity comments in JUMP.
The complete opposite of Watanabe who was somewhere off in space.