Jacobus Oud

Jacobus Johannes Pieter Oud, commonly called J. J. P. Oud was a Dutch architect. His fame began as a follower of the De Stijl movement.

Oud was born in Purmerend, the son of a tobacco and wine merchant. As a young architect, he was influenced by Berlage, and studied under Theodor Fischer in Munich for a time. He worked together with W.M. Dudok in Leiden, which is where he also met Theo van Doesburg and became involved with the movement De Stijl.

Source: Wikipedia