Yes. But the challenge is to avoid the common suggestion that he is the child of John Ponder and Joan Burton Winthrop Ponder. The time frames do not work. Wiliam was born in 1550. Joan (1470-1520) is a generation apart. However John and Joan had 6 children, one of whom was a William born @ 1496. It was common for the eldest son to be named after his father. So far I susupect that this William is the father of Willialm Pond, "old Pond" referred in John Winthrop's letter. ( A caution about dates - they are rarely similar when checking multiple sources AND if you examine some of these old documents you will note the spelling is often way off - Ponder, Pondyr, Pond)