Also van·dyke (for defs 2, 3).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for anthony vandyke
"short, pointed beard," 1894, from the style shown on portraits by Flemish painter Anton Van Dyck (1599-1641); earlier "a type of collar with a deep cut edge" (1755) also from a style depicted in his paintings.
Online Etymology Dictionary, © 2010 Douglas Harper