I was stunned to find out that even the famous painter Rembrand is Jewish – https://en.wikipedia.org/wiki/Rembrandt

His father was Reformed church (protestant) and mother Roman Catholic. But according to his paintings and the fact that public practice of Roman Catholicism was almsot banned at the time he lived (1606 – 1696), my guess is he was protestant or even a crypto jew. It is known that he didn’t attended protestant church congregations neither Roman Catholic.