The singer holds the two babies in the Instagram picture BEYONCE has posted an elaborate photograph on social media to introduce her and husband Jay Z’s newborn twins to the world. The singer also confirmed the names of the boy and girl in the Instagram post – her first public acknowledgement of their birth. “Sir Carter and Rumi 1 month today,” she wrote alongside the picture. In the photo Beyonce, 35, poses outdoors in a colourful gown and long veil as she cradles both babies while standing beneath a floral arch with the ocean behind her. The post received just under two million likes within the first hour. Sir Carter and Rumi are younger siblings to…