Statistics for occurrence #1 of “John Winthrop” in chapter 11 of Medford Historical Society Papers, Volume 30.:

...says that the slaver Mayflower was a ship of 350 tons, while the Pilgrim vessel was only 150. The latter came to Salem in 1629, and the last known of her was when she was one of a fleet that landed John Winthrop and his colonists in Charlestown in 1630.—Boston Herald. The most authentic information fixes the tonnage of the Mayflower of the Pilgrims at 120 tons.
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Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
† John Winthrop 968 16 50 2 0 user votes
Fitz John Winthrop 34 0 0 0 0 user votes
Fitz-John Winthrop 12 0 0 0 0 user votes
John Winthrope 8 0 2 0 0 user votes
John Winthrop Esq 2 0 0 0 0 user votes
John Winthrop Senr 1 0 1 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.