Meet Joe Don Rooney's Little Rascal, Raquel Blue

At least one thing was easier for Rascal Flatts guitarist Joe Don Rooney‘s wife Tiffany Fallon during her second pregnancy: The birth.

“I had a tough delivery with Jag,” Fallon recalls of the arrival of son Jagger Donovan, now 2. “So that anxiety sets in — I was crazy nervous again.”

However, giving birth to now 10-week-old daughter Raquel Blue — who was born Sept. 7 — was surprisingly smooth.

“It was tremendously easier this time,” she tells PEOPLE in the December country issue. “I was anxious right outside the hospital, like, ‘Oh no, this is going to be hard again.’ But it was actually a joy to be there, I didn’t want to leave!”

More difficult for the couple was actually naming their baby girl.

“We had so many names picked out,” Rooney, 35, explains. “It’s harder to choose a girl’s name because there are so many that are beautiful — it’s hard to narrow it down. ”

Perhaps fittingly, Fallon eventually found a celebrity-inspired name.

“I have always liked Raquel Welch,” she explains. “I always liked her and her name. It’s unusual — you don’t hear about many Raquels. I wanted an ‘R’ to go with Rooney. So I threw it out there one day and Joe Don was crazy about it.”

Rooney explains the baby’s less traditional middle name, saying, “Her birthstone is sapphire, blue represents serenity, and we just liked the way it sounded.”

Even with all that effort, there are still the inevitable nicknames — and everyone in the family is getting in on the act.

“With her brother being Jagger, I felt like we needed to rock it up a little bit,” Fallon, 36, says. “We call her Rocky! Everyone has their nicknames for her though. My mom calls her Baby Blue. Some people go with Raquel, some use both names.”

“And Jag calls her Sissy,” Rooney adds. “But Raquel feels right; when Tiffany said it, it felt right in my gut and my heart. Just like when she said Jagger, that felt exactly right.”

For more on Joe Don Rooney and all your favorite country stars, pick up the new issue of PEOPLE Country, on newsstands now. For free country music downloads, go to PEOPLE.com/free.

— Sara Hammel with reporting by Kay West