Matricide is: 1. A one man (Tiburtius) Black Metal band from Uddevalla, Sweden. Formed in 2002. 2. The '80s Florida-based Death Metal solo project of former Morbid Angel bassist John Ortega. Formed in Winter Haven, FL in 1987. 3. Dutch hardcore band from the town Heemskerk. 4. A Death Metal band from Sweden, formed in 1992, released 01 demo called "A Child's Litany Matricide" 5. Canadian Thrash Metal/Crossover band formed in 1989.