There are a number of artists using the name Madman 1. Italian rapper. Most notable for working with Gemitaiz. 2. American producer, songwriter, and engineer who creates songs and instrumentals for film, media, and radio in genres that include Hip Hop, RnB, Pop, Soul, Trap, Dramatic, Action, and Cinematic. In 2007, Madman was signed to Darkchild Ent. as Rodney Jerkins' head engineer and in-house producer. He began writing songs, constructing melodies