There are two possibilities in Foster:
(1) Martyn, Thomas, gent. Christ Church, matric. 10 Nov. 1654, BA 4 Feb. 1657-8, MA 1660 (incorporated at Cambridge 1664), BD 1669; one of these names beneficed in Essex. See Alum. West., 142; Foster's Index Eccl.
(2) Martin, Thomas, gent. Exeter Coll., matric. 29 Mar. 1656; BA from Christ Church 1659, MA 1662; perhaps rector of Sampford Orcas, Somerset, 1661. See Foster's Index Eccl.
Cf. ID 52947.