Background
He was the son of Henry IV van Montfoort and Margretha van Croy.
He was the son of Henry IV van Montfoort and Margretha van Croy.
January van Montfoort opposed the Burgundian rule of the Utrecht in the person of Bishop David of Burgundy. This led to the First Utrecht Civil War between 1470–1474 and the Second Utrecht Civil War between 1481–1483. After the Siege of Utrecht (1483) peace was concluded but January van Montfoort lost his Fiefs of Purmerend-Purmerland and Zuid-Polsbroek, which were confiscated and given to nobles close to Maximilian of Austria.
Van Montfoort supported Frans van Brederode during his failed rebellion between 1488–1490.
Van Montfoort died in 1522 and was buried in the church of Montfoort.