Analysis of information sources in references of the Wikipedia article "Nizozemska reformirana cerkev" in Slovenian language version.
[...] the Dutch Reformed Church, with the support of the States General in The Hague, and the Heren XIX, endeavoured to organize itself in an effective manner as the public church in 'New Holland' as Dutch Brazil was officially designated. Although the first two salaried predikanten arrived in 1633, it was not until 1635 that clear and detailed guidelines for the organization of the Reformed faith in Dutch Brazil were laid down.
He was of the Dutch Reformed Church. He participated in missions work with his father
His religious affiliation was Dutch reformed
the Calvinist traditions in Roosevelt's ancestry: the Dutch Reformed Church on his father's side