Peerage Record – 52581

     Theodosia Mahon was the daughter of Thomas Mahon and Hon. Jane Crosbie.¹ She married Conolly McCausland-Gage, son of Conolly McCausland and Elizabeth Gage, on 15 January 1778.¹ She died on 3 May 1822.²
     From 15 January 1778, her married name became McCausland-Gage.¹

     Luke Mahon was the son of Captain Nicholas Mahon and Magdalene French.¹ He died, young.¹

     Bartholomew Mahon was the son of Captain Nicholas Mahon and Magdalene French.¹ He died, unmarried.¹

     Venerable Arthur Mahon was born circa 1716.¹ He was the son of Very Rev. Peter Mahon and Catherine Gore.¹ He married Henrietta Downes, daughter of Rt. Rev. Robert Downes, on 16 July 1748.¹ He died in May 1788.¹
     He graduated from Trinity College, Dublin University, Dublin, County Dublin, Ireland^G, in 1737 with a Bachelor of Arts (B.A.)¹ He held the office of Archdeacon of Elphin in 1743.¹ He was Curate in 1749 at St. Nicholas, Dublin, County Dublin, Ireland.² He held the office of Prebendary of Howth in 1750.² He was Rector after 1750 at Ballymoney, County Antrim, Ireland.²

     Henrietta Downes was the daughter of Rt. Rev. Robert Downes.¹ She married Venerable Arthur Mahon, son of Very Rev. Peter Mahon and Catherine Gore, on 16 July 1748.¹ She died on 6 October 1802.¹
     From 16 July 1748, her married name became Mahon.¹

     Rt. Rev. Robert Downes held the office of Bishop of Raphoe.² He held the office of Bishop of Ferns and Leighlin.¹

     Robert Mahon is the son of Venerable Arthur Mahon and Henrietta Downes.¹
     He lived at Cavetown, County Roscommon, Ireland^G.¹

     Reverend Arthur Mahon is the son of Robert Mahon.¹
     He lived at Cavetown, County Roscommon, Ireland^G.¹

     Lt.-Col. Maurice Hartland Mahon is the son of Reverend Arthur Mahon.¹

     John Campbell was born in 1715. He married Hon. Mary Blayney, daughter of Cadwallader Blayney, 7th Lord Blayney, Baron of Monaghan and Mary Touchet, in 1743.¹ He died in 1789.
     He lived at Dublin, County Dublin, Ireland^G.¹