However , more recent research reveals , according to the Netherlands Institute for Art History , that Adam was the brother of Susanna de Colonia .
They were the children of an Antwerp saddle maker Louis Jansz Colonia .
However , more recent research reveals , according to the Netherlands Institute for Art History , that Adam was the brother of Susanna de Colonia , and they were the children of an Antwerp saddle maker Louis Jansz Colonia .