Maria Sibylla Merian
Maria Sibylla Merian (2 April 164713 January 1717) was a German-born naturalist and scientific illustrator, a descendant of the Frankfurt branch of the Swiss Merian family. Merian was one of the first naturalists to observe insects directly.
Sibylla Sambetha
The woman's identity is lost. There have been a number of attempts to associate her with a historical person, including in the 19th century, as Willem Moreel's daughter Mary. Willem Moreel was a magistrate of Bruges who commissioned from Memling a portrait diptych and, later, a triptych for the Church of Saint James at Bruges which he had founded. But any identities have in turn been rejected; in the case of Mary Moreel, she would have been too young in 1480 to be the woman portrayed.