Portrait of Jancke van Douma van Langweer van Oldenboorn (1568⁄9-1631), three-quarter-length, in a yellow doublet, resting his hand on a hat

A portrait of the present sitter's younger sister, Cnier van Douma van Langweer van Oldenboorn (1576⁄7-1651), was sold in these Rooms, 8 June 2023, lot 84 (Fig. 1). Jancke died unmarried, and the portraits were most probably inherited by the children of Cnier’s son, Sjuk Sjuks van Burmania (1597-1650), who had died a year before his mother. For centuries they descended through the family at Martena Castle in Kornjum, together with about thirty other portraits of the Burmania family, and remained together until sold separately following their appearance at auction in 1991. A nineteenth-century pastel copy of Jancke's portrait is now in the Fries Museum in Leeuwarden. Friesian portraits from the years around 1600 elude secure attribution, as no signed examples are documented.