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Earl Inchiquin is in Earl Ireland.
In May 1654 Murdough O'Brien 1st Earl Inchiquin (age 40) was created 1st Earl Inchiquin. Elizabeth St Leger Countess Inchiquin by marriage Countess Inchiquin.
On 9th September 1674 Murdough O'Brien 1st Earl Inchiquin (age 60) died. He was buried at St Mary's Cathedral, Limerick, County Limerick. His son William (age 34) succeeded 2nd Earl Inchiquin.
On 16th January 1692 William O'Brien 2nd Earl Inchiquin (age 52) died. His son William (age 30) succeeded 3rd Earl Inchiquin. Mary Villiers Countess Inchiquin by marriage Countess Inchiquin.
On 24th December 1719 William O'Brien 3rd Earl Inchiquin (age 57) died. His son William (age 19) succeeded 4th Earl Inchiquin.
On 29th March 1720 William O'Brien 4th Earl Inchiquin (age 20) and Anne Hamilton 2nd Countess Orkney and Inchiquin were married. She by marriage Countess Inchiquin. She the daughter of George Hamilton 1st Earl Orkney (age 54) and Elizabeth Villiers Countess Orkney (age 63). He the son of William O'Brien 3rd Earl Inchiquin and Mary Villiers Countess Inchiquin. They were first cousins.
On 18th July 1777 Murrough O'Brien 1st Marquess Thomond (age 51) succeeded 5th Earl Inchiquin. Mary O'Brien 3rd Countess Orkney and Inchquin (age 56) by marriage Countess Inchiquin.
On 10th February 1808 Murrough O'Brien 1st Marquess Thomond (age 82) died. His nephew William (age 43) succeeded 2nd Marquess Thomond, 6th Earl Inchiquin. Rebecca Trotter Marchioness Thomond (age 33) by marriage Marchioness Thomond.
On 21st August 1846 William O'Brien 2nd Marquess Thomond (age 81) died. On 21st August 1846 His brother James (age 77) succeeded 3rd Marquess Thomond, 7th Earl Inchiquin.
William O'Brien 2nd Earl Inchiquin and Margaret Boyle Countess Inchiquin were married. She by marriage Countess Inchiquin. She the daughter of Roger Boyle 1st Earl Orrery and Margaret Howard Countess Orrery. He the son of Murdough O'Brien 1st Earl Inchiquin and Elizabeth St Leger Countess Inchiquin.