John Gryffyn
John Gryffyn, of Dorchester and Middleton, Dorset, was an English politician.
He married Margaret, the widow of John Fytheler, and had a stepson, William Fytheler. There is no record of him having children of his own.
He was a Member of the Parliament of England for Dorchester (UK [Parliament constituency)|Dorchester] in April 1414.