Rotselaar is a municipality in the province of Flemish Brabant (dutch: Vlaams-Brabant).
The municipal administration of Rotselaar:
Letters: Burgerlijke Stand, Provinciebaan 20, 3110 Rotselaar, Belgium.
E-mail: burgerlijke.stand@rotselaar.be

A private initiative:
http://vandersloten.be/wrw/index.htm => (left side) Familienamen.

Gr.
Fons Cuppens