Willaerts is a surname of Dutch origin. People with that name include:
Abraham Willaerts ( - 1669), Dutch painter Adam Willaerts (1577–1664), Dutch painter Isaac Willaerts (1610/1620 - 1693), Dutch painter
See also Adrian Willaert ( - 1562), Flemish composer Steve Willaert (active from 1993), Belgian composer, arranger, musician and producer