http://users.cougar.net/~susan1/Gardiner.htm
Guess on Birthplace per brothers Richard and Thomas
John never married.

1640: John Gardiner, was one of seven people whom Richard Gardiner,
Sr. demanded 600 acres of land 31 Mar 1640 for the transportation of
these people into Maryland. (SOURCE: Maryland Patents, Liber 1, f.
62, Hall of Records, Annapolis, MD.)

1637: John Gardiner was four years old when he was transported to
Maryland by his father, Richard Gardiner, Sr. Richard demanded land
for the transportation of his wife & children in 1637. (SOURCE:
Maryland Patents, Liber 1, f. 17 & 167-168, Hall of Records,
Annapolis, MD.)