Britney Spears and Kevin Federline have named their newborn son Sutton Pierce Federline, sources close to the couple tell PEOPLE.
The infant, born Tuesday at a Los Angeles hospital, now has the same initials as his big brother, Sean Preston Federline.
The boys also (almost) share a birthday – Sean Preston turned 1 on Thursday, just two days after his brother was born.
Sutton Pierce has two half-siblings as well: sister Kori, 4, and brother Kaleb, 2, his dad's kids with actress Shar Jackson.
A rep for Spears declined to comment.