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3.
Beyonce and Jay-Z's first child together. Born on January 7th 2012. Supposedly, she was named "Blue" because Jay-Z loves the color blue. He has albums "Blueprint 1, 2 & 3" and rumor has it he once dated R&B singer Blu Cantrell.

The name "Ivy"references the Roman numeral "IV" representing the number four, which is apparently significant to both Beyonce and Jay-Z. Beyonce's birthday is Sept. 4, Jay-Z's is Dec. 4, the couple was married on April 4, 2008 and the Beyonce's latest album is entitled "4."

There are also some more bizarre theories surrounding the name. There's the crazy theory that Blue Ivy is an anagram for the name "Eulb Yvi," which some have claimed is Latin for "Lucifer's daughter" or that Blue stands for "Born Living Under Evil" and "Ivy" stands for "Illuminati's Very Youngest." All of these theories of course stem back to equally rumors that Jay-Z and Beyonce are members of a secret cult called the Illuminati. But those are just "rumors".
OMG, did you know Beyonce's baby Blue Ivy was the only baby born on January 7th 2012?

What the hell kind of name is Blue Ivy?

Blue Ivy Carter, initialized B.I.C aka Bitch In Charge.
by Schneidzer January 09, 2012
 
1.
The name of Beyonce's and Jay-Z's first child
I wish I was Blue Ivy . She boutta be set for life
by @__FuckYouuTho January 08, 2012
 
2.
Jay-Z and Beyonce's firstborn child. since social media has been triffling lately some say 'Ivy Blue' stands for 'Illuminati's Very Youngest Born Living Under Evil' and 'Ivy Blue' backwards means 'Lucifers daughter' in latin.
Leroy: Yo dawg, you heard of Blue Ivy?
Princeton: You mean Hov and Bey's first kid?
Leroy: Yeah... i hope she don't look like her daddy tho.
Princeton: Damn straight
by DontSpitBitch January 14, 2012
 
4.
Beyonce Knowles' and Jay-Z's unknown, hardly existing first child who recieved the nickname "The Blanket" in Europe because that's almost the only way we get to see her. She was born after long years of trust, love and fun in her parent's couple. The child was made fun of by "La Scandaleuse" (= The Scandalous one) several times, being called "Purple" on her blog. "Blue Ivy" backwards is Latin for "Lucifer's daughter", they say, especially due to her parent's being suspected of being part of the Illuminati. She's also known for putting her mom to shame when her fake pregnancy belly folded on a talk show.
- Rayshawn, have you heard? The Blanket is in town!
- Oh, you mean, Blue Ivy?
by KingKassie February 16, 2013
 
5.
1. Beyonce and Jay-Z's new baby.
2. a science fiction STD.
1. "Wow Blue Ivy, your play room looks Sasha Fierce!"
2. "The entire Marcabian fleet was infected with the blue ivy after paying a visit to Snookizord, the harpy with 1000 vaginas."
by Scandalous Randlby January 08, 2012