Grissell Fletcher was married several times; married surnames were Jewell, Griggs, Burge and Gurney.
Grissell's marriage to John Burge here.
Grissell Fletcher's parents are in this bloggers family tree:
2096. Robert Fletcher, born about 1593; died 03 April 1677 in Concord, MA.
From an earlier blog:
Thomas Jewell was my ancestor through his daughter, Hannah, who married John Parish.