Who or what is Dark Child, I've heard alot artists like Beyonce, Brandy, Tony Braxton say it in a song?

Rodney "Darkchild" Jerkins (born September 14, 1977 in Pleasantville, New Jersey) is an African-American Grammy Award-winning songwriter, record producer, and musician. Working largely with his brother Fred Jerkins III & writer LaShawn Daniels, Jerkins has been an extremely in-demand producer for over a decade, being requested by such legends as Michael Jackson, Whitney Houston & Lionel Richie. He has also produced recent singles by Mary J. Blige ("Enough Cryin'") and Beyonc� ("Deja Vu") and worked on the latest album from Ciara. The word "Darkchild" appears in some form in many of his tracks.