It's a girl for Rob and Amber Mariano!

The Mariano girls - Carina Rose, Isabetta Rose and Lucia Rose © Courtesy Mariano family 

Rob and Amber Mariano have welcomed a third daughter into their family. The reality couple, who participated in Survivor and The Amazing Race, are already parents to two girls under three. Their baby

Rob and Amber Mariano © Scott Wintrow/Getty

girl came into the world on May 5th, 2012, the couple told People Magazine, they named their daughter Isabetta Rose. She was born in Pensacola, Florida, and weighed 7lbs., 3 oz./3,25 kg. Isabetta joins big sisters Lucia Rose, 2½, and Carina Rose, 18 months. 

Amber said, "Isabetta Rose was born on Cinco de Mayo. Isabetta was born with a full head of brown hair and blue eyes. 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."

Rose as a middle name is a tradition in the Mariano household. Amber said, "Rob really liked the idea of all of our girls sharing the same middle name. Many cousins on his side also share Rose as their middle name." Isabetta was a first name contender, but nothing was decided until after her birth, "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."

Isabetta Rose © Courtesy Mariano family