(Courtesy: Wikipedia)
Sir Charles van Dyck or van Dyke (1599 - 1641) is the painter. Though a Dutchman, he became the court painter in England. He is known for his paintings of King Charles I, which is why the beard style is also known as 'Charlie'.
van Dyke has other things named after him.
Van Dyke Brown is an early photographic printing process named as such because the brown colour obtained by using the process resembled the brown oil paint used by the painter.
A Van Dyke suit is a velvet suit worn by young men in the late 19th and early 20th centuries (don't ask for further details, Wiki hasn't any).