Thanks for looking. I just purchased a classic reprint of The Pratt Family (of Weymouth) and have "sort of" answered my own question. Joseph Pratt married Lydia Leonard 09 Dec 1712. Their dau. Tabitha married Seth Hayward. His brother, Benjamin, who married Sarah Kingman are the parents of Ann Pratt who married Azariah Hayward. Benjamin's birth year is 1693, which would make him nearly 100 yrs older than his wife, Sarah... ???