I have no evidence that any of these children (Joe, George, John and Thomas) belong to John
1737 "(sj1928) John Vincent, captain of the Rachel, is from Jersey" Keith Mathew's name files
1739 John Vincent, fisherman of St. John's or Petty Harbour (see map), about 1739-43; "Family Names of the Island of Newfoundland" by E.R. Seary /Barbara Pederson
1749 Vincent & Batt vol 1, pg 37. From: Colonial Secretary's Office, Outgoing Correspondence, PANL G.N.2/1/a: tommy@pathcom.com
Oct. 1773 "John Vinson is reported on the muster rolls of N/Abbot. Bosun on the Hagdown of Dartmouth. Discharged in Newfoundland." Keith Mathew's name files
March 15, 1775 to Oct. 10th "(bt 98/3) William Vinson of Torquay on active Holloway ex same Discharged in NFLD." Keith Mathew's name files
March 15, 1775 to Oct. 10, 1775 "(bt 98/3) John Vinson of Torquay active on the Holoway ex same discharged in Newfoundland." Keith Mathew's name files