Rob and Amber Mariano Welcome Daughter Isabetta Rose

Amber gave birth to their third daughter, Isabetta Rose, on Saturday, May 5, the couple tell PEOPLE exclusively.

Leave it to winning competition show veterans Rob and Amber Mariano to know nothing beats reality TV quite like reality itself.

Amber, 33, gave birth to their third daughter on Saturday, May 5, the couple tell PEOPLE exclusively.

Delivered in Pensacola, Fla., and weighing 7 lbs., 3 oz., “Isabetta Rose was born on Cinco de Mayo,” Amber says.

The newest Rose joins Lucia Rose, 2½, and Carina Rose, 18 months, in the ever-expanding Mariano household.

“Isabetta was born with a full head of brown hair and blue eyes,” notes Amber.

“She still has all of her hair almost six weeks later, and her eyes are still as blue as can be. Her sisters can’t get enough of her. They always want to hold her and I’m not sure who gives her more kisses — her big sisters or her parents!”

Amber says although she thought of ‘Isabetta’ as a potential name last year, “we never name our babies until we actually meet them. When we saw her for the first time that afternoon, we knew it was the perfect name for her. ”

Retaining the Rose name is a tradition for the Mariano family. “Rob really liked the idea of all of our girls sharing the same middle name,” Amber says. “Many cousins on his side also share Rose as their middle name. ”

While Amber has enjoyed motherhood away from the spotlight in the past few years, ‘Boston’ Rob, 36, has continued their other tradition — reality shows — winning Survivor: Redemption Island and appearing on History Channel’s Around the World in 80 Ways in 2011.

“Three girls under 3 has made life a little crazy at times,” says Amber, “but that is what Rob and I are all about. We are absolutely loving life with our three little princesses.”

— Cynthia Wang