Like many other celebrities, Beyonce Knowles and her husband, Jay-Z, have given their newborn baby girl a unique name.
Many fans are speculating about the origin of Blue Ivy Carter, who was born on Saturday at New York's Lenox Hill Hospital.
Bloggers are offering their own theories.
ABC News explained Jay-Z's franchise albums have been called the Blueprint. Blue is also a four-letter word, and four happens to be the couple's favorite number. Both Beyonce and Jay-Z were born on the fourth day of the month. They were also married on April 4. Beyonce's latest album in simply titled "4."
Some are speculating that the middle name, Ivy, stems from the roman numeral IV, which is another way of writing the number four.
The Washington Post writes, the color blue is considered the coolest color of the spectrum. Ancient Egyptian used blue to represent the heavens. Blue also symbolizes the Virgin Mary. The color represents inspiration, sincerity and spirituality.