1974 or 1975 (age 49–50)[1]) is an Olympia, Washington-based artist and experimental musician.

During Old Time Relijun's hiatus, he formed a new band based on Indonesian music called Malaikat dan Singa.

[2] De Dionyso directed Reak: Trance Music and Possession in West Java, a documentary film about the music of an Indonesian trance ceremony; the film was shown by the Olympia Film Society in May, 2016.

[3] He is also a co-founder[4] of the Olympia Experimental Music Festival.

Designer Hedi Slimane incorporated de Dionyso's drawing "Dragons and Angels in Deep Conversation" in various fashions as part of the Yves Saint Laurent 2015 collection.