Oxoniensis has a John Denison DD whose son John also DD is said to have been rector of Quendon in 1651 .
Denison, John of co. Warwick, pleb. Magdalen Hall, matric. 22 May, 1590, aged 20; B.A. from Balliol Coll. 8 Feb., 1593-4, M.A. 4 July, 1600 (then in orders), licenced to preach 22 Jan., 1605-6, B.D. 23 April, 1607, D.D. 20 June, 1611, domestic chaplain to George, Duke of Buckingham, chaplain to James I., chief moderator free school, Reading, Berks, vicar of St. Mary, Reading, 1593, of St. Laurence, Reading, 1603, and of St. Giles, Reading, 1612, rector of Woodmansterne, Surrey, 1610, until his death, buried there 1 Feb., 1628-9, father of the next named. See Ath., ii. 439; Foster's Index Ecclesiasticus; & D.N.B.
Denison, John 'doctoris fil.' Balliol Coll., matric. 15 Oct., 1631; B.A. 17 Oct., 1631, M.A. 11 June, 1634, rector of Quendon, Essex, 1651. See Foster's Index Ecclesiasticus
John senior left a will
https://discovery.nationalarchives.gov.uk/details/r/D880246
https://www.ancestry.co.uk/sharing/29661668?h=b553d7
Confusing?