The will of William Havens of Portsmouth is dated 13 March 1680, proved 25 Sep 1683. It mentions wife Dennis; 5 sons: John, Thomas, Robert, George, & William: and 8 dtrs: Sarah Tiler, Mary Cook, Ruth Cards, Dinah, Elizabeth, Martha, Rebecca, & Margaret Havens.
I have roughly estimated his date of marriage and the birth years of his children.