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Dutch Bass player, born in Volendam August 22th, 1948. Together with [a=Cees Tol] and [a=Evert Woestenburg] and his brother Gerrit Woestenburg, Jan co-founded the band [a=BZN]. Together with [a=Jan Keizer], he was responsible for the lyrics. Together with [a=Jack Veerman] they own a production company: JJJ Productions.