LONDON — Terry Jones, a founding member of the anarchic Monty Python troupe who was hailed by colleagues as “the complete Renaissance comedian” and “a man of endless enthusiasms,” has died at age 77 after suffering from dementia.

Jones’s family said he died Tuesday evening at his home in London “after a long, extremely brave but always good humored battle with a rare form of dementia.”

“We have all lost a kind, funny, warm, creative and truly loving man whose uncompromising individuality, relentless intellect and extraordinary humor has given pleasure to countless millions across six decades,” Jones’s wife, Anna Soderstrom, and children Bill, Sally and Siri, said in a statement.

Born in Wales in 1942, Jones attended Oxford University, where he began writing and performing with fellow student Michael Palin.

After leaving university, he wrote for seminal 1960s comedy series, including “The Frost Report” and “Do Not Adjust Your Set.” At the end of the decade he and Palin, along with Eric Idle, John Cleese, Graham Chapman and Terry Gilliam, formed Monty Python’s Flying Circus. The troupe’s irreverent humor — a blend of satire, surrealism and silliness — helped revolutionize British comedy.

“Terry was one of my closest, most valued friends. He was kind, generous, supportive and passionate about living life to the full,” Palin said in a statement.

“He was far more than one of the funniest writer-performers of his generation. He was the complete Renaissance comedian — writer, director, presenter, historian, brilliant children’s author, and the warmest, most wonderful company you could wish to have,” Palin said.

Jones wrote and performed for the troupe’s TV series, which aired for five years on the BBC, and films including “Monty Python and the Holy Grail” in 1975 and “Monty Python’s Life of Brian” in 1979.

Playing the mother of Brian, a hapless young man who is mistaken for Jesus, he delivered one of the Pythons’ most famous lines: “He’s not the Messiah. He’s a very naughty boy!”