Mad Men actress January Jones, 33, has given birth to a son, naming the new arrival Xander Dane Jones. Jones, a single first time mom who has never hinted who the father of the child could be, is still not giving any details, but it’s believed to be someone with whom she worked on X-Men: First Class. She announced her pregnancy last April. Although she wasn’t well liked by the boy who played her son on Mad Men, who called her “unapproachable,” Matthew Weiner, the creator of the show has confidence she’ll be a good mother, saying, “She has wanted this very badly. She’s got a big heart and she’s been talking about having children since I met her, which is not always common with actresses. I think she’s going to be an amazing mother.”