Petrus Hendrikus "Piet" van Zeil was a Dutch politician of the defunct Catholic People's Party (KVP) and later the Christian Democratic Appeal (CDA) party and trade union leader.

Hillegom is a town and municipality in the Western Netherlands, in the province of South Holland. Hillegom is part of an area called the Duin- en Bollenstreek. As such, a large portion of the local economy was traditionally geared to the cultivation of bulb flowers.