Congratulations to Beyonce and Jay-Z who welcomed their first child, a baby girl, born in New York on Saturday.

And what do you name arguably the world’s most famous baby? Blue Ivy Carter. What do you think of the name?

Ivy could be a reference to the matching tattoo, the roman numerals IV, that Beyonce and Jay-Z (real name Sean Carter) have on their wedding fingers.

Beyonce, 30, checked into Lenox Hill Hospital on Friday, despite previously releasing her due date as February. The baby was delivered via scheduled caesarean section.

Staff at the hospital were asked to turn in their mobile phones while security cameras have been taped up, according to US Weekly, so that no news or photos will be leaked to the media.

“The most beautiful girl in the world,” Beyonce’s sister Solange announced via Twitter.

Bestie Gwyneth Paltrow also took to Twitter to celebrate. “Welcome to the world Blue! We love you already.”

Another close friend Rihanna tweeted: “Welcome to the world princess Carter! Love Aunty Rih.”

Congratulations to Beyonce and Jay-Z! What do you think of the name Blue Ivy?