 In 1939 Dutch historian Nicholas Beets proposed that the Flemish artist and cartographer Cornelis Antoniszoon ( or Antonisz . , c . 1507 – 1553 ) could have been Anthony Anthony 's brother . Although Beets ' suggestion of kinship was conjectural and without any direct evidence , it was picked up by Geoffrey Callender in the Mariner 's Mirror in 1963 and has been relayed by several other authors . The will of William Anthony did not mention any other sons and Anthonisz. is believed to have been the son of Antonis Egbertson , the daughter of Jacob Corneliszoon van Oostzanen . That Cornelis and Anthony were related is , in the words of Ann Payne , " not , presumably , impossible , but there is little evidence that they were connected at all " . 
