There are at least FIVE bands called AD:

1.) AD is a 'mathmetal/hardcore' band rom L.A, in the vain of bands like Botch, Deadguy and Disembodied, whilst also showing sludge and crust influences in their music.

2) AD is a music project by Jarbas Agnelli and Waldo Denuzzo, from Sao Paulo, Brazil. Jarbas is a film director, owner of AD Studios. Waldo is his partner, producing soundtracks for most of the spots directed by Jarbas. In 2001, they released their debut album, AD (Trama). Jarbas produced and directed 4 music videos for the band, "Tools", "Contact", "Get Down" and "Call my Name".

3) AD is a 1980's Christian Rock vehicle for ex-Kansas band member/songwriter Kerry Livgren. They released four albums: Time Line, Art of the State, Reconstructions, and Prime Mover.

4) AD (Acción Directa) is an electroindustrial band from Turku, Finland. It has been described as "Captain Beefheart meets Ministry" and "Björk on acid", both very accurate descriptions. This AD was originally founded in the 80´s, released three vinyl albums (AD!, Beirut, and Vladivostok), and disappeared. At the request of Tocapo Viracocha AD was reactivated in the end of year 2004. The comeback albumTocapo! was released in April 2005 by Plastic Passion.

In September 2006 independent record labels Plastic Passion and Kenolamusic released Acción Directa´s new album Bodysuit. The album is "perhaps the hardest electro album ever released in Finland".

http://www.ad-tocapo.com/

5) A minimal synth band who released an LP called Conspiracy in 1979.

6) Rapper from Slovakia (Prievidza).

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