My sons name is Raymond Angelo Ortega / Fellmeth, But his name was changed to Rudy, according to my mom & sis?

My son Raymond Angelo Ortega/Fellmeth was taken on August 16,2004,My mom & sister said that they changed his name to Rudy,There's a possibility that he might be under Rudy Meyers or Rudy Excovitto, His d/o/b is05-13-1996, s.s.n. 619-90-0147, his regulation # on his Birth certificate is 1199624-001090, My family says that he's been killed by the R/W, I need closure please