Question: When did Sir Theodore Brinckman, 1St Baronet's father die?

Knowledge 1: Sir Theodore Brinckman, 1st Baronet
Sir Theodore Henry Lavington Brinckman, 1st Baronet (17 January 1798 – 9 February 1880) was a British politician and baronet.Born Theodore Broadhead, he was the son of Theodore Henry Broadhead and his wife Elizabeth Macdougall, daughter of William Gordon Macdougall.In 1842, by Royal Licence, he and his brothers resumed the surname Brinckman, which the family had carried before 1786 and their grandfather had changed.In 1821 he entered the British House of Commons in a by-election for Yarmouth, the same constituency his father has represented before and was a Member of Parliament until 1826.On 30 September 1831, Brinckman was created a baronet, of Burton or Monk Bretton, in the County of York.He married firstly Hon.Charlotte Godolphin Osborne, only daughter of the 1st Baron Godolphin on 29 August 1829.She died in 1838, and Brinckman married secondly Annabella Corbet, daughter of John Corbet on 18 February 1841.He had five children by his first wife, a daughter and four sons.They lived at St. Leonard's in Clewer near Windsor in Berkshire.Brinckman died, aged 82 and was succeeded in the baronetcy by his oldest son Theodore. [SEP] Knowledge 2: Theodore Henry Broadhead
Theodore Henry Broadhead (3 December 1767 – 12 December 1820) was an English army officer and politician.
Knowledge 1: Sir Theodore Brinckman, 1st Baronet
Sir Theodore Henry Lavington Brinckman, 1st Baronet (17 January 1798 – 9 February 1880) was a British politician and baronet.Born Theodore Broadhead, he was the son of Theodore Henry Broadhead and his wife Elizabeth Macdougall, daughter of William Gordon Macdougall.In 1842, by Royal Licence, he and his brothers resumed the surname Brinckman, which the family had carried before 1786 and their grandfather had changed.In 1821 he entered the British House of Commons in a by-election for Yarmouth, the same constituency his father has represented before and was a Member of Parliament until 1826.On 30 September 1831, Brinckman was created a baronet, of Burton or Monk Bretton, in the County of York.He married firstly Hon.Charlotte Godolphin Osborne, only daughter of the 1st Baron Godolphin on 29 August 1829.She died in 1838, and Brinckman married secondly Annabella Corbet, daughter of John Corbet on 18 February 1841.He had five children by his first wife, a daughter and four sons.They lived at St. Leonard's in Clewer near Windsor in Berkshire.Brinckman died, aged 82 and was succeeded in the baronetcy by his oldest son Theodore. [SEP] Knowledge 2: Theodore Andrea Cook
Sir Theodore Andrea Cook (28 March 1867 – 16 September 1928) was a British art critic and writer.
Knowledge 1: Sir Theodore Brinckman, 1st Baronet
Sir Theodore Henry Lavington Brinckman, 1st Baronet (17 January 1798 – 9 February 1880) was a British politician and baronet.Born Theodore Broadhead, he was the son of Theodore Henry Broadhead and his wife Elizabeth Macdougall, daughter of William Gordon Macdougall.In 1842, by Royal Licence, he and his brothers resumed the surname Brinckman, which the family had carried before 1786 and their grandfather had changed.In 1821 he entered the British House of Commons in a by-election for Yarmouth, the same constituency his father has represented before and was a Member of Parliament until 1826.On 30 September 1831, Brinckman was created a baronet, of Burton or Monk Bretton, in the County of York.He married firstly Hon.Charlotte Godolphin Osborne, only daughter of the 1st Baron Godolphin on 29 August 1829.She died in 1838, and Brinckman married secondly Annabella Corbet, daughter of John Corbet on 18 February 1841.He had five children by his first wife, a daughter and four sons.They lived at St. Leonard's in Clewer near Windsor in Berkshire.Brinckman died, aged 82 and was succeeded in the baronetcy by his oldest son Theodore. [SEP] Knowledge 2: Theodore Martin
Sir Theodore Martin( 16 September 1816 – 18 August 1909) was a Scottish poet, biographer, and translator.

Answer: 12 December 1820