Career
Three generations of Dutch people have grown up with her illustrations. The drawings she made for Jip en Janneke, a series of stories which ran in Dutch newspaper Het Parool from 1953 to 1957, now adorn a variety of items sold by Dutch department store HEMA. Since the regular Dutch awards for illustrations always eluded her, she was given a unique award for her entire oeuvre in 1997. Since 2007, the University of Amsterdam have an endowed chair for illustration in Westendorp"s honor.