K.A.H.W. Leenders was born in 1946 in Den Bosch, but grew up in Breda. He is working as a demographer at the province of Zuid-Holland. He is also active as a historic-geographer, with special interest for the landscape history of western Noord-Brabant and northern Antwerp. He obtained his doctorate in 1996 in Amsterdam on a study on the medieval history of that area.