The Friday File: In 2011, more newborns were born in August, 360,000, than any other month. July and September were next with 346,000 each. The least most popular month was February with 299,000. In ’11, the most popular names for girls were Sophia and Isabella, while for boys it was Jacob and Mason. In 1911, the top names for girls were Mary and Helen, and for boys, John and William.