Robert married Mary. Born ca 1617. Mary died in Wallingford, CT in 1696.
Clarence Leslie Hewitt, Jr., argues in his article “Some light on the marriage of Robert and Mary Royce of Connecticut” in New Eng. Hist. Gen. Reg. 122 (1968): 274-277 that Mary, Robert’s wife was not Mary Sims, Simms, or Symmes, of Long Sutton, Somerset. There was a Robert Royce who married a Mary Sims in Long Sutton on 4 Jun 1624. Hewitt says the “1624 wedding hardly works out, credibly or chronologically, with their emigration to America or the birthday of their first born. ... It would therefore seem most unlikely that Robert and Mary would have remained continent or been barren from 1624 to 1634 or that all their children born in that decade could have perished in infancy.” It remains a possibility, though, that they could have been married in 1624 and all their children from the first ten years died.