Jessica Simpson is stealing Kim Kardashian baby thunder -- the singer gave birth to her second child with fiance Eric Johnson over the weekend and the baby boy's name definitely tops Kim and Kanye's headline-grabbing moniker North Nomiddlename West.

The proud parents of one Maxwell Drew (their one-year-old daughter) welcomed little Ace Knute into the world on Sunday.

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No, the baby isn't named after famed Notre Dame football coach Knute Rockne, he's named after Johnson's Swedish grandfather -- and it's pronounced "Ka-nute," according to the LA Times.

"Ace Knute Johnson has arrived! Mom and baby are doing great," a rep for the couple tells "Jessica, Eric and Maxwell are thrilled to welcome the new addition to their family."

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Simpson gave birth via a scheduled C-section.

Simpson and Johnson got engaged in November 2010.