[1] Oxenden was the eldest son of Richard Oxinden (1588–1629), of Little Maydekin in Barham, Kent and Katherine, daughter of Sir Adam Sprakeling of Canterbury.
He matriculated from Corpus Christi College, Oxford, on 10 November 1626, and graduated BA 1 April 1627.
He married, first, on 28 December 1632, Anne (died 1640), daughter of Sir Samuel Peyton, by whom he had a son Thomas, baptised on 27 February 1633.
His second marriage, on 15 September 1642, was to Katherine (died 1698), daughter of James Cullen, by whom he left no male issue.
Oxinden was author of: ‘Religionis Funus et Hypocritæ Finis,’ 1647; ‘Jobus Triumphans,’ 1651; 'Image Royal,’ 1660, and ‘Charles Triumphant: a Poem,’ 1660.