Karel van der Pluym

Karel van der Pluym (1625, Leiden – 1672, Leiden), was a Dutch Golden Age painter.

Biography He was the son of Dominicus van der Pluym (1593-1661) and Cornelia van Suytbroeck (1597-1652), the first cousin of Rembrandt.https://www.christies.com/en/lot/lot-6436461 According to the RKD he was a pupil of Rembrandt.Karel van der Pluym in the RKD According to the Frick gallery, their "old woman with a book" was purchased by Henry Clay Frick in 1916 as a Rembrandt. Old woman with a book at the Frick Collection

References

Karel van der Pluym on Artnet Karel van der Pluym at PubHist