"Susanna (Dimmock), b. say 1646; … (The existence of this child was convincingly argued by Edith Bartlett Sumner, on the basis of the names of the children of this couple, and the service of Shubael Dimmock as one of the appraisers of the inventory of Robert Shelley [Hall-Baldwin 169]. We differ with her only in placing Susanna as the youngest child rather than the oldest, based on the dates of birth of her children.)"
Since her last known child was born in 1689, she could have been born as early as 1634, and with the gap of as much as six years before the birth of Thomas Dimmock's eldest known child born in New England, she could possibly have been the daughter of an earlier, unknown, wife of her father's.