But instead of Steak, Penn Jnr was gifted a name inspired by one of his dad's favourite actors.
"It has to do with Dennis Hopper; my dad was friendly with him and idolised him," Hopper tells the magazine.
"What they told me is that I hopped in her stomach, I didn't kick, so they went with that,” he continued.
The 22-year-old also opened up about life as the kid of two A-listers, "My dad is a really good actor, and there are a lot of s---ty actors, and I definitely think I'm one of them."