Portraits of children by Dutch portraitist Thomas de Keyser. Living from around 1596 to 1667, he was the most in demand if you wanted to be immortalized until Rembrandt came along.

1600s Thomas de Keyser (Dutch painter, c. 1596–1667) Portrait of a Young Boy
Portrait of a young boy. 17th c. Dutch. In the public domain. via http://godsandfoolishgrandeur.blogspot.com/2014/08/a-boy-and-his-dog.html
"Group Portrait of Three Brothers." ca. 1627-32.
“Group Portrait of Three Brothers.” ca. 1627-32. Oil on pan el. Collection of the Rijksmuseum, Amsterdam. In the public domain. via https://www.liveinternet.ru/users/4248621/post464103778/

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