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Former Teen Mom 2 star Jenelle Evans and boyfriend Nathan Griffith confirmed via Twitter that they welcomed their son Kaiser on Monday.

Griffith tweeted a photo of the infant's tiny feet next to Evan's arm in the hospital and wrote, "And you thought we were at the beach... Sike!!!"

Though this is the couple's first child together, Evans has a son Jace, 5, with ex-boyfriend Andrew Lewis and Griffith has a daughter named Emery from a previous relationship.

So why the name Kaiser? "We were basically searching for baby names on the Internet, and we came up with a bunch of different unique ones," Evans told Us Weekly earlier this year. "We didn’t want something that everyone else had or had even heard before, even us. So we wanted something different, and we ended up looking up Kaiser."

Congrats!