In a lawsuit submitted by their son Maurice about 1715: He mentions messuages, lands, etc. that his grandfather David Lloyd was seized with about 1671, and then goes on to say 'In consideration of a marriage then to be had between Evan Lloyd son of David and Mary Williams daughter of Lewis Williams of Llewyn Rhuddod gent. deceased, who were Petitioners father and mother, ...'
Since Maurice doesn't get his uncle's death year quite correct, the year 1671 shouldn't be assumed to be overly accurate.