Hi,
Here is a little info which might help you chase up other leads . They are not really part of my family tree, hence I'm afraid I've been a little sloppy in noting sources
Mine are Magraths, but the Magraths did marry several Youngs - both families from Co Cavan,
Rev James Young abt 1761-abt 1810 (guesstimates) Rector of Timolin , Co Kildare. Ref'd to as 'the late' on marriage of son Chas Sheridan in 1835; Married Jane Smyth
Dgtr Anna Maria b abt 1792;Marriage 11 Aug 1812 • St Geo, Dublin. (SAMUEL SWANZY, of Cavan, solicitor, Clerk of the Crown for Co. Cavan, h. 1790, m. 11 Aug., 1812, Anna Maria, eldest dau. of the Rev. James Young, Vicar of Timolin, Co. Kildare, (brother of John Young, of Philpotstown, Co. Meath), by Jane, dau. of Patric...Samuel Swanzy (1786–1859)
Son Rev Chas Sheridan Young ,Education 31 May 1825 • Trinity College, Dublin . Pen. (PT) May 31 1825, aged 16; s of James, Clericus, b Cavan. BA Vern 1831. Alumni Dublinenses, 1924 ed.; Marriage 14th Feb 1835 • St Geo COI Dublin '...Charles Sheridan, young son of the Late Rev James Young, Rector of Timolin & Leighlin in the Co. of Kildare to Mary, daughter of the Late Folliott Magrath esq of Dublin'. Dublin Evening Packet & Correspondent , 17th Feb 1835. (Honeymoon in Lucan) Mary Magrath (1810–)
Hope this helps