"The name is just so amazing," she told Usmagazine.com over the weekend at a Kate Somerville Emmys gifting suite in L.A. "I love how she comes up with these exotic names. I think Harlow and Sparrow sound cute together."
Richie, who celebrated her 28th birthday Sunday, is "just so excited to have boy," Hilton told Us. "It's a perfect addition to the family. It just makes them the perfect little family."
But she said she doesn't think Richie and beau Joel Madden will wed anytime soon.
Said the heiress, 28: "I just think they are just happy."
As for Hilton's own love life?
She said things are "good" with on-again beau Doug Reinhardt.
"We were just in Fiji and Bora Bora, Indonesia and Europe together," she told Us. "He's, like, my best friend. We are just very close. I just tell him everything. We have a lot in common. So it's nice to be together."