On 24 Jul 1800 [his father] Nathaniel Clements 2nd Earl Leitrim (age 32) and [his mother] Mary Bermingham were married. He the son of Robert Clements 1st Earl Leitrim (age 67) and Elizabeth Skeffington Countess Leitrim.
On 27 Jul 1804 [his grandfather] Robert Clements 1st Earl Leitrim (age 71) died. His son [his father] Nathaniel Clements 2nd Earl Leitrim (age 36) succeeded 2nd Earl Leitrim.
On 15 Oct 1806 William Clements 3rd Earl Leitrim was born to Nathaniel Clements 2nd Earl Leitrim (age 38) and Mary Bermingham.
In 1839 William Clements 3rd Earl Leitrim (age 32) was elected MP County Leitrim.
On 05 Feb 1840 [his mother] Mary Bermingham died.
On 31 Dec 1854 [his father] Nathaniel Clements 2nd Earl Leitrim (age 86) died. His son William Clements 3rd Earl Leitrim (age 48) succeeded 3rd Earl Leitrim.
On 02 Apr 1878 William Clements 3rd Earl Leitrim (age 71) was assassinated along with his clerk and driver, near Cratlagh Wood while on his way to Milford (a village he owned in its entirety) from his home, Manor Vaughan (usually known as Mulroy House), on Mulroy Bay. Michael Heraghty and brothers Thomas and Bernard McGranahan were arrested. The gun butt had been traced to Heraghty, and paper for the wadding used to load the rifle was traced to a school copybook owned by the McGranahans. The McGranahans were released from Lifford Jail due to a lack of evidence. Heraghty died in Lifford Jail of typhus... The assassins, Nial Shiels of Doughmore, an itinerant tailor, Michael Hergarty of Tullyconnell, and Michael McElwee of Ballyworiskey, were from the remote Fanad Peninsula.
Kings Wessex: Great x 23 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 20 Grand Son of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 26 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 21 Grand Son of Maredudd ap Bleddyn King Powys
Kings England: Great x 14 Grand Son of King Edward III of England
Kings Scotland: Great x 19 Grand Son of William "Lion" I King Scotland
Kings Franks: Great x 20 Grand Son of Louis VII King Franks
Kings France: Great x 16 Grand Son of Philip "The Fair" IV King France
Great x 1 Grandfather: Nathaniel Clements
GrandFather: Robert Clements 1st Earl Leitrim
Great x 1 Grandmother: Hannah Gore
Father: Nathaniel Clements 2nd Earl Leitrim 13 x Great Grand Son of King Edward III of England
Great x 1 Grandfather: Clotworthy Skeffington 1st Earl Massereene 11 x Great Grand Son of King Edward III of England
GrandMother: Elizabeth Skeffington Countess Leitrim 12 x Great Grand Daughter of King Edward III of England
Great x 1 Grandmother: Anne Eyre Countess Massereene
William Clements 3rd Earl Leitrim 14 x Great Grand Son of King Edward III of England
GrandFather: William Bermingham of Rose Hill
Mother: Mary Bermingham