John Porter appears in the records of Hingham in 1637; it is on this basis that he is shown in Anderson's Great Migration Directory. (It is also presumable, though no known record of their marriage date and location exists, that his wife Mary should also be PGM.)
John's GMD listing: “Porter, John: Unknown; 1637; Hingham, Salem [HiBOP 98r; Hingham Hist 3:115; Dudley Wildes 135-38; TAG 30:157-58; Mower Anc 494-500].” -- Excerpt From: Robert Charles Anderson, FASG. “The Great Migration Directory.” iBooks.