I was in a relationship with an ex boyfriend and he wasn't treating me right so I decided to date some one else we dated for a while and I found out I was pregnant and I told him he said the baby might not be his it might be my ex well the baby was born I did a dna on my ex and the baby was not his so I call my boyfriend and told his the baby wasn't my ex it was his and he told me not it wasn't so I told him I going to put child support on him and he told me thati couldn't I ask why and he told me he lied about his last name how can I go about finding out his last name if I only know the fist and have an old number that doesn't work anymore can I geta lawyer and they can rquest it from the company:confused::(