When Susanna Williamson was born about 1696, in Maryland, St. Mary, Louisiana, United States, her father, Ralph Williamson, was 25 and her mother, Ann Tarleton, was 23.
English (Northern) and Scottish: from the Middle English personal name William + patronymic -son ‘son of William’. This surname is also found in Northern Ireland (Ulster), especially in Antrim.
Americanized form of Norwegian, Danish, and North German Wilhelmsen , Swedish Wilhelmsson, or Dutch and North German Willemsen , all cognates of 1.
History: This surname was brought to North America from northern England and northern Ireland independently by numerous different bearers from the 17th century onward. Timothy Williamson is recorded in Plymouth Colony in 1643.