- Is Greek-American.
- Was close friends with fellow Teaneck native, and Lost Co-creator Damon Lindelof.
- Veteran of the Lincoln Center Festival.
- Graduated from the Dance and Theatre Dept. Manhattanville College Purchase, New York.
- Reared in Teaneck, New Jersey. Graduated from Teaneck High School.
- Son of Helen C. and John Tavantzis of Teaneck, New Jersey.
- Son-in-law of Angela and Theodore Volandes of Brooklyn, New York.
- He graduated from Manhattanville College in Purchase, New York.
- He was a job developer for the Center for Employment Opportunities in New York City.
- He and his wife Ava welcomed their first child, a son born in February, 2009. Theodore John Tavantzis, aka Theo Tavis.
- Second son John Sebastian was born December, 2012.
- Listed in Manhattanville College's Notable Alumni.
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