Jay-Z and Beyonce & BLUE IVY... Blue Ivy isn't a traditional baby name by any means. But the couple had many reasons for choosing this name for their daughter. Blue represents Jay-Z's favourite colour and Ivy is taken from the Roman number IV. The number 4 is the name of Beyonce's 4th album, and the couple wed on April 4, 2008.

Blake Lively and Ryan Reynolds & baby girl JAMES... It was first thought that the couple named their firstborn daughter Violet, but it has since been revealed that they chose a boy's name for their baby girl. According to reports, the couple's daughter is named James.

Gwyneth Paltrow & baby girl APPLE... Gwyneth Paltrow's daughter Apple probably has one of the wackiest names in Hollywood. The name was apparently Gwyneth's husband Chris Martin's suggestion, and they both agreed it sounded "sweet" and "wholesome".

Rachel Bilson and Hayden Christensen & BRIAR ROSE... The new parents and Jumper co-stars welcomed their baby daughter on October 29. The former O.C. actress named their baby Briar Rose, which is the nickname given to Princess Aurora in Disney's Sleeping Beauty.

Holly Madison &baby girl RAINBOW AURORA... Holly Madison defended her decision to name her baby girl Rainbow Aurora. She said, "I want my daughter to be proud of who she is and learn to speak up and stand up for herself at a young age. I spent most of my life being a people-pleaser who worried about what other people thought or thought was cool and I don't want that for her."

Jason Bateman and Amanda Anka & The Horrible Bosses star and his wife chose a sweet name for their daughter, Maple Sylvie.

Jason Lee & son PILOT INSPECTOR... The My Name is Earl star and his wife named their son Pilot Inspektor. Why? He was inspired by the band Grandaddy's album The Sophtware Slump. "The opening track, 'He's Simple, He's Dumb, He's the Pilot,' absolutely blew my mind when I first heard it. It was from this track that my wife, Beth, came up with the name Pilot for our son."

Jermaine Jackson & JERMAJESTY... Jermaine Jackson clearly likes the letter J, having named his first three kids Jeremy, Jourdynn and Jaafar. He didn't break the pattern the fourth time around, naming his son Jermajesty.

Kate Hudson and Matthew Bellamy & son BING... The couple named their son Bingham Bellamy, or "Bing" for short. Bingham was Matt's mother's maiden name.

Kate Winslet & son BEAR BLAZE... The Divergent actress has revealed how her and husband Ned Rocknroll landed on the name Bear Blaze for their son. "Bear" refers to a longtime friend of Kate's, and "Blaze" refers to the devastating house fire where the couple met.

Kanye West and Kim Kardashian & baby girl NORTHWEST... Kim and Kanye named their baby girl North West. No middle name was listed on the birth certificate.

Dax Shepard and Kristen Bell & baby girl LINCOLN BELL SHEPARD The couple named their baby girl Lincoln Bell Shepard. Why did they choose a traditionally masculine name for their daughter? Lincoln is also the name of Dax's classic 1967 car, which he refers to as 'Lady Lincoln'.

Ashton Kutcher and Mila Kunis & baby girl WYATT ISABELLE That '70s Show co-stars Mila Kunis and Ashton Kutcher weren't satisfied with the name they had initially chosen for their daughter, Wyatt Isabelle. Ashtobn revealed the name came to them during a joke discussion at a Lakers game.

Pharrell Williams and Helen Lasichanh & son ROCKET... The Grammy-winning producer confirmed rumours that his five-year-old son Rocket was named after an Elton John song. The 40-year-old said, "I really respect Elton John's music. Contrary to popular belief, Rocket's middle name is not Man. But Elton John's Rocket Man song was a part of it and also Stevie Wonder's Rocket Love."

Shannyn Sossamon & son AUDIO SCIENCE... The A Knight's Tale actress named her son Audio Science Clayton. Let that sink in for a second. She said, "We wanted a word not a name, so my boyfriend read through the dictionary three or four times. We were going to call him Science, but thought it might get shortened to Sci, as in Simon."