Beyoncé & Jay Z’s Twins’ Names Revealed The names of Beyoncé and Jay Zs new twins may finally have been revealed! We have yet to see the power couples new bundles of joy, but it looks like official papers may have inadvertently announced their names. TMZ.com reports that legal documents show the proud parents are seeking to lock down rights for the names Rumi Carter and Sir Carter. The papers were supposedly filed on June 26 by the same company, which is owned by Beyoncé and Jay Z, that sought to trademark Blue Ivys name back in February. Beyoncé & Jay Zs Twins Names Revealed was originally published on hellobeautiful.com