^Usually "Pijnacker" in Dutch sources, but still "Pynacker" in English ones. For example "Adam Pynacker" is the "preferred" spelling of Getty Union, is used by the National Gallery in Washington [1]Archived 2011-06-12 at the Wayback Machine, the Fitzwilliam in Cambridge [2]Archived 2011-06-12 at the Wayback Machine & the Courtauld in London etc.