to Count Amadeus V of Savoy. John I had several illegitimate children: Gillis van der Balcht Jean Meuwe, Seigneur of Wavre and Dongelberg. Margareta of Tervuren, she was married on 2 March 1292 to Jean de Rode de Lantwyck Jan Pylyser (1272–1342) Jan van der Plasch Legacy The duke is remembered in the folkish song Harbalorifa that remains popular. The popular Dutch beer Hertog Jan was named after the duke. Also the beer Primus of the Haacht Brewery is named after John I (Jan Primus) Ancestry See also Dukes of Brabant family tree Hertog Jan References Bibliography H. Barlandus, Rerum gestarum a Brabantiae ducibus historia usque in annum 1526 (Leuven, 1566) G. C. van der Berghe, Jean le Victorieux, duc de Brabant (1259–1294), (Leuven, 1857) K. F. Stallaert, Gesch. v. Jan I. van Braband en zijne tijdvak (Brussels, 1861) A. Wauters, Le Duc Jean Ier et le Brabant sous le règne de ce prince (Brussels, 1859) 1250s births 1294 deaths Dukes of Brabant House of Reginar