Jay-Z’s name is a shortened version of an early nickname, “Jazzy”… Another popular nickname for Jay-Z is “Jiggy”… In 2005 he announced he wanted to be known by his real name, Shawn Carter, but he has remained most widely known by his nickname… Jay-Z and Beyoncé have a daughter, Blue Ivy Carter, born on January 7, 2012, and twins born in June of 2017. In an Instagram post on July 14, 2017, Beyoncé said the twins were “1 month today” and gave their names as Sir Carter and Rumi… Jay-Z became a part-owner of the NBA team the New Jersey Nets in 2004, though his ownership stake was less than 1% of the team; they later became the Brooklyn Nets, and Jay-Z sold his stake in 2013.