Historian Aaron Dougherty has been named interim executive director of the Winslow House in Marshfield. He started June 1 and has already seen visitors from as far away as Oregon and California, he said in an interview. In previous jobs, Dougherty was a park guide for the National Park Service in Boston and portrayed English settlers at Plimouth Plantation. A Michigan native, he said he earned a master’s degree in early American history from Eastern Michigan University. He has studied the sociology of the Salem witch trials, economic and social development of New England and Virginia, religious practices in early America, and the influence of the American Revolution on American Indian nationalism prior to the War of 1812. The Winslow House was built circa 1699 for Judge Isaac Winslow, grandson of Edward Winslow, a Mayflower passenger and governor of Plymouth Colony. “The structure and the family are both fascinating,” Dougherty said.