Watkin Tudor Jones (born 26 September 1974), better known by his stage names Ninja and Max Normal, is a South African rapper, singer, songwriter, record producer, and actor. Tudor Jones found international success as a member of Die Antwoord, with Yolandi Visser. He was formerly a member of Max Normal and The Constructus Corporation.

Tudor Jones also has had a number of acting roles, including a self-styled role as Ninja in the 2015 Neill Blomkamp film Chappie.

Watkin Tudor Jones was born on 26 September 1974 in Johannesburg, South Africa. He attended Parktown Boys' High School where he met his The Original Evergreen band members. Tudor Jones frequented nightclubs where he developed his skills as a rapper.

Tudor Jones was part of the South African rap band The Original Evergreen, which was signed to Sony Music. He released one single with the group, "Puff the Magik", which was banned from radio for its controversial lyrics about marijuana usage. In 1996, after the track would later win a SAMA music award for Best Rap Album award, he left to release a solo album under Chameleon Records and later form Max Normal. The band released Burn the Evidence in 1997, which caused more notoriety in the South African music scene. In 1998, the band resurfaced in Cape Town with a new lineup featuring Brendon le Roux (vocals), Sebastian Voigt (bass, programming), Richard Bruyns (guitar), Stephen Trollip (saxophone), Phat Jack (turntables), Tasha Baxter (vocals) and Sven Mc Alpine (drums), and played extensively in Cape Town and Johannesburg while working on a new album titled Addictive Personalities, produced by Warrick Sony (Kalahari Surfers) and featuring a guest appearance by Arno Carstens (Springbok Nude Girls). The album was to be released on the Sheer Sound label. Still, it caused such uproar in the South African press due to the contents of its lyrics that Sheer Sound was forced to withdraw it and was the final chapter in The Original Evergreen story as it resulted in the band splitting up. The album Addictive Personalities was released in a limited run by Melt 2000 in 1999.

In 2001, Tudor Jones released his debut solo album Memoirs of a Clone.Produced by Adrian Levi and Waddy Jones. Memoirs of a clone was Produced by Waddy Jones and Adrian levi and released through Chameleon Records. At the time, he was the lead vocalist of Max Normal, a hip hop act, which released their debut album entitled Songs From The Mall in 2001, which he disbanded in 2002. Their last gig was played with Faithless on the group's 2002 South Africa tour.

When Tudor Jones disbanded Max Normal in early 2002, he and musician Sibot invited Markus Wormstorm and Felix Laband to collaborate on The Constructus Corporation project, which resulted in the concept album and graphic novel The Ziggurat, released on 3 June 2002.

Tudor Jones asked Anri du Toit, better known as his Die Antwoord bandmate Yolandi Visser to lend vocals for the project. She was credited as Anica the Snuffling.

The Constructus Corporation disbanded in 2003.