Superstar couple Beyoncé Knowles and Jay-Z have welcomed their first child - a baby girl named Blue Ivy Carter. She arrived via scheduled caesarean section at Lenox Hill Hospital in New York City last night.BLUE IVY CARTER - MEANING OF HER NAME
Ivy is in reference to the couple's love of the number four - roman numeral for 4 is IV
Beyoncé and Jay-Z were married on April 4, 2008
Jay-Z's birthday is December 4
Beyoncé's birthday is September 4
Beyoncé and Jay-Z have matching IV tattoos on their wedding fingers
The singer's latest album is called 4 which was her fourth solo studio album
Jay-Z has a trilogy of albums under The Blueprint banner which could have inspired his daughter's name
He has released The Blueprint, The Blueprint 2: The Gift & The Curse and The Blueprint 3
A source told Beyoncé's hometown newspaper Houston Chronicle that 'mother and baby are doing fine'.
The baby's middle name Ivy may be in reference to Beyoncé and Jay-Z's love of the number 4. They married on April 4, 2008, Beyoncé's latest album is called 4 and the couple have matching tattoos of the roman numeral for 4 - IV - on their wedding fingers.
Beyoncé and Jay-Z were also born on September 4 and December 4 respectively.
Regarding Blue, Jay-Z has a trilogy of albums with the word in the title. The Blueprint was released in 2001 around the time he got together with Beyoncé, The Blueprint2: The Gift & The Curse came out in 2002 and The Blueprint 3 in 2009.
Despite initial confusion the baby was named Ivy Blue, E! reporter Ken Baker later clarified friends of the couple have confirmed the newborn was actually called Blue Ivy.