In 1765 [his father] Robert Clements 1st Earl Leitrim (age 32) and [his mother] Elizabeth Skeffington Countess Leitrim were married. She the daughter of Clotworthy Skeffington 1st Earl Massereene and Anne Eyre Countess Massereene (age 48).
On 09 May 1768 Nathaniel Clements 2nd Earl Leitrim was born to Robert Clements 1st Earl Leitrim (age 35) and Elizabeth Skeffington Countess Leitrim.
In 1795 [his father] Robert Clements 1st Earl Leitrim (age 62) was created 1st Earl Leitrim. [his mother] Elizabeth Skeffington Countess Leitrim by marriage Countess Leitrim.
On 24 Jul 1800 Nathaniel Clements 2nd Earl Leitrim (age 32) and Mary Bermingham were married. He the son of Robert Clements 1st Earl Leitrim (age 67) and Elizabeth Skeffington Countess Leitrim.
In 1802 [his daughter] Maria Clements was born to Nathaniel Clements 2nd Earl Leitrim (age 33) and [his wife] Mary Bermingham.
On 27 Jul 1804 [his father] Robert Clements 1st Earl Leitrim (age 71) died. His son Nathaniel Clements 2nd Earl Leitrim (age 36) succeeded 2nd Earl Leitrim.
On 15 Oct 1806 [his son] William Clements 3rd Earl Leitrim was born to Nathaniel Clements 2nd Earl Leitrim (age 38) and [his wife] Mary Bermingham.
In 1812 [his son] Francis Nathaniel Clements was born to Nathaniel Clements 2nd Earl Leitrim (age 43) and [his wife] Mary Bermingham.
On 29 May 1817 [his mother] Elizabeth Skeffington Countess Leitrim died.
On 05 Feb 1840 [his wife] Mary Bermingham died.
On 31 Dec 1854 Nathaniel Clements 2nd Earl Leitrim (age 86) died. His son [his son] William Clements 3rd Earl Leitrim (age 48) succeeded 3rd Earl Leitrim.
Edward Southwell Keppel and [his daughter] Maria Clements were married. She the daughter of Nathaniel Clements 2nd Earl Leitrim and Mary Bermingham. He the son of William Charles Keppel 4th Earl Albermarle and Elizabeth Southwell Countess Albermarle. He a great x 3 grandson of King Charles II of England Scotland and Ireland. 
Kings Wessex: Great x 22 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 19 Grand Son of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 25 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 20 Grand Son of Maredudd ap Bleddyn King Powys
Kings England: Great x 13 Grand Son of King Edward III of England
Kings Scotland: Great x 18 Grand Son of William "Lion" I King Scotland
Kings Franks: Great x 19 Grand Son of Louis VII King Franks
Kings France: Great x 15 Grand Son of Philip "The Fair" IV King France
Great x 1 Grandfather: Robert Clements
GrandFather: Nathaniel Clements
Father: Robert Clements 1st Earl Leitrim
GrandMother: Hannah Gore
Nathaniel Clements 2nd Earl Leitrim 13 x Great Grand Son of King Edward III of England
Great x 1 Grandfather: Clotworthy Skeffington 4th Viscount Massereene 17 x Great Grand Son of King John "Lackland" of England
GrandFather: Clotworthy Skeffington 1st Earl Massereene 11 x Great Grand Son of King Edward III of England
Great x 1 Grandmother: Catherine Chichester Visountess Massereene 
10 x Great Grand Daughter of King Edward III of England
Mother: Elizabeth Skeffington Countess Leitrim 12 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: Henry Eyre of Row Tor in Derbyshire
GrandMother: Anne Eyre Countess Massereene
Great x 1 Grandmother: Elizabeth Hickman