Vincent “Don Vito” Margera, best known for his appearances on MTV’s “Jackass” and “Viva La Bam” and the uncle of Bam Margera, died early Sunday, Bam’s agent confirmed. He was 59.

The reality star died of liver and kidney failure, Bam’s mother told TMZ, which first reported the news. He had slipped into a coma in Philadelphia last month after his condition continued to worsen.

Vincent was a favorite of the “Jackass” guys, often becoming a target of their pranks, along with carrying out a few of his own. He appeared on the MTV series and the “Jackass” movies, as well as having a prominent role in his nephew’s “Viva La Bam,” which aired on MTV from 2003 to 2006.

He earned the “Don Vito” nickname through his nearly unintelligible speech that often required captions on TV, much like “The Godfather’s” Don Vito Corleone. Vincent was also featured in “Haggard: The Movie” and “Minghags.”

Vincent had run into some legal trouble in the decade before his death. In 2007, he was found guilty of two counts of sexual assault on a child and was sentenced to ten years probation, and also had to give up his alter ego for ten years.

Vincent’s death is only the latest loss to the MTV family in recent years. “Jackass” star Ryan Dunn died in June, 2011, in a car accident at the age of 34.