Brian McKnight is paying child support on a 1-year-old boy bearing his name -- and his baby mama is using Kevin Federline's attorney to get her money.
McKnight was in court last week for a child support hearing over little Evan Brian McKnight. The mother, Miriam Moreno, hired Mark Vincent Kaplan -- who repped K-Fed in his divorce from Britney Spears.
We don't know if there has been an official paternity test -- but seeing as the kid has the last name McKnight, and McKnight is paying up child support ... well, you figure it out.