Question: When is Sir William Lowther, 3Rd Baronet's father's birthday?

Knowledge 1: Sir William Lowther, 3rd Baronet
Sir William Lowther, 3rd Baronet (1727 – 15 April 1756) was an English landowner, of Marske Hall, Yorkshire and Holker Hall.He was the eldest son of Sir Thomas Lowther, 2nd Baronet and Lady Elizabeth Cavendish.In January 1755, he inherited the Whitehaven estates and coal mines from his fourth cousin once removed, Sir James Lowther, 4th Baronet, and succeeded him as Member of Parliament for Cumberland.However, he died unmarried in 1756, last of his line.He left the bulk of his estates, including the Whitehaven inheritance, to his fourth cousin, James Lowther.Holker Hall, which had come from his grandmother Catherine Preston, was left to a distant cousin of his mother Lady Elizabeth Cavendish, Lord George Cavendish.Marske Hall was bought by Thomas Dundas, later Lord Dundas, in 1762. [SEP] Knowledge 2: Sir Thomas Lowther, 2nd Baronet
Sir Thomas Lowther, 2nd Baronet (20 April 1699 – 23 March 1745) was an English landowner, dwelling at Marske Hall, Yorkshire.He was the only son of Sir William Lowther, 1st Baronet and Catherine Preston.On 2 July 1723 he married Lady Elizabeth Cavendish, daughter of William Cavendish, 2nd Duke of Devonshire, and had one son:He was thought to be the probable legatee of Sir James Lowther, 4th Baronet, and his alcoholism was concealed from Sir James by the rest of the family for fear he would be disinherited.In the event, Sir James survived him by a decade.
Knowledge 1: Sir William Lowther, 3rd Baronet
Sir William Lowther, 3rd Baronet (1727 – 15 April 1756) was an English landowner, of Marske Hall, Yorkshire and Holker Hall.He was the eldest son of Sir Thomas Lowther, 2nd Baronet and Lady Elizabeth Cavendish.In January 1755, he inherited the Whitehaven estates and coal mines from his fourth cousin once removed, Sir James Lowther, 4th Baronet, and succeeded him as Member of Parliament for Cumberland.However, he died unmarried in 1756, last of his line.He left the bulk of his estates, including the Whitehaven inheritance, to his fourth cousin, James Lowther.Holker Hall, which had come from his grandmother Catherine Preston, was left to a distant cousin of his mother Lady Elizabeth Cavendish, Lord George Cavendish.Marske Hall was bought by Thomas Dundas, later Lord Dundas, in 1762. [SEP] Knowledge 2: Sir William Lowther, 2nd Baronet
Sir William Lowther, 2nd Baronet( c. 1694 – 6 March 1763) was an English landowner from Swillington, and a baronet in the Baronetage of Great Britain.He was the eldest son of Sir William Lowther, 1st Baronet by his wife, Annabella Maynard.He was educated at schools in Wakefield and Leeds before being admitted to Sidney Sussex College, Cambridge, as a fellow- commoner on 28 February 1713.He succeeded his father as baronet and as Member of Parliament for Pontefract in 1729.He was forced to sell his Pontefract burgages, from which he derived most of his influence in the constituency, in straightened financial circumstances in 1740, and left the Commons when it was dissolved the following year.He was twice married.His first wife, Diana Condon, whom he married in 1719, was the daughter of Thomas Condon.She died on 1 January 1736, and he married his second wife, Catherine Ramsden( died 5 January 1778), the daughter of Sir William Ramsden, 2nd Baronet, later the same year on 17 August 1736.He had no children by either wife.He left the Swillington estate to his first cousin, Rev. William Lowther, who was later made a baronet and whose son was created Earl of Lonsdale in 1807.
Knowledge 1: Sir William Lowther, 2nd Baronet
Sir William Lowther, 2nd Baronet( c. 1694 – 6 March 1763) was an English landowner from Swillington, and a baronet in the Baronetage of Great Britain.He was the eldest son of Sir William Lowther, 1st Baronet by his wife, Annabella Maynard.He was educated at schools in Wakefield and Leeds before being admitted to Sidney Sussex College, Cambridge, as a fellow- commoner on 28 February 1713.He succeeded his father as baronet and as Member of Parliament for Pontefract in 1729.He was forced to sell his Pontefract burgages, from which he derived most of his influence in the constituency, in straightened financial circumstances in 1740, and left the Commons when it was dissolved the following year.He was twice married.His first wife, Diana Condon, whom he married in 1719, was the daughter of Thomas Condon.She died on 1 January 1736, and he married his second wife, Catherine Ramsden( died 5 January 1778), the daughter of Sir William Ramsden, 2nd Baronet, later the same year on 17 August 1736.He had no children by either wife.He left the Swillington estate to his first cousin, Rev. William Lowther, who was later made a baronet and whose son was created Earl of Lonsdale in 1807. [SEP] Knowledge 2: Sir William Lowther, 1st Baronet, of Little Preston
Sir William Lowther, 1st Baronet( 10 July 1707 – 15 June 1788) was an English landowner and curate, of Little Preston, Yorkshire.The eldest son of Christopher Lowther( d. 1718) and grandson of Sir William Lowther, he went to school in Kirkleatham before entering Trinity College, Cambridge in 1726.Ordained priest in 1734, he became rector of Swillington from 1757 to 1788.On 31 August 1753, he married Anne Zouch( d. 1759), sister of Thomas Zouch.They had two sons, each of whom married a daughter of John Fane, 9th Earl of Westmorland: In 1754, he bought Alverthorpe Hall from his cousin, Thomas Maude.He inherited the estate of Swillington in 1763, upon the death of his first cousin Sir William Lowther, 2nd Baronet.The following year, on 22 August 1764, he was himself created a baronet.

Answer: 20 April 1699