Lola Sophia was born Friday in Los Angeles and weighed 7 pounds, 2 ounces, "Entertainment Tonight" reported on its Web site Monday.
The couple's first child has brown hair and blue eyes. She was born in the company of Wilson's father, Brian Wilson of the Beach Boys, while the band's "Pet Sounds" played in background.
Carnie Wilson, former member of the Wilson Phillips female trio, and Bonfiglio, former guitarist for Blush, have been married more than four years.
Bonfiglio, who had expected a girl, had thought of naming her Lola Brianna when the couple announced the pregnancy in September.