Given the following context:

The three-quarter view was widely used in southern German portraiture of the late-15th century. Rosary beads were often included to indicate the piousness and modesty of the sitters, although by the 16th century religious motifs and sentiments like this were falling out of fashion. Dürer distinguishes himself from his contemporaries through his tight and detailed focus on his parents' faces, a technique that draws comparison to the work of the first generation of Early Netherlandish painters active 50 years earlier. Albrecht the Elder had travelled to Flanders and from working with Netherlandish artists had acquired a strong appreciation for the work of both Jan van Eyck and Rogier van der Weyden.  That he passed on this influence to his son is evident from the early use of silverpoint, a medium which according to Erwin Panofsky requires "an exceptional degree of confidence, accuracy and sensitive feeling for its successful handling".
Dürer would have been aware of Hans Pleydenwurff's portrait of the ageing Count Georg von Lowenstein, through his teacher Michael Wolgemut. Pleydenwurff's portrait was in turn likely influenced by van Eyck's 1438 Portrait of Cardinal Niccolò Albergati. Von Fircks believes the portrait of Dürer's father took from Pleydenwurff's portrait, which she describes as a "highly detailed representation of [a] white haired old man, who defies the pains of growing old with an alert mind and an inner animation".Von Fircks notes that Dürer's 1484 self-portrait was created with the use of a mirror while his most iconic work is a self-portrait; the 1500 Self-Portrait at Twenty-Eight. From these she concludes that the "accurate observation and documentary recording" of both his own and his parents' appearances over time was not just a compulsion, but that is indicative of a deeper interest in the effects of time and age on human appearance. Although Dürer was fascinated by the effects of ageing on others, he seems to have had some hesitancy at examining how it might affect him personally. The...

answer the following question:

What was the name of the person whose 1500 portrait was their last? 

Dürer