In 1800 Keith drew up the heads of a new corn bill, which was passed to the corn committee of the House of Lords by Sir William Pulteney. Family Keith married, on 26 August 1783, Helen, daughter of James Simpson, merchant, of Old Meldrum. She died on 8 January 1798. They had four sons and three daughters. The eldest son, James, born on 18 January 1788, became colonel in the British army, and died during the retreat from Cabul on 19 October 1839. Alexander, born on 13 November 1792, is known as a writer on biblical prophecy. John, born on 7 May 1797, was ordained assistant and successor at Keith-Hall on 3 May 1821, and succeeded to the charge on his father's translation. He wrote the account of the parish for the new Statistical Account of Scotland (1845).
In 1800 Keith drew up the heads of a new corn bill, which was passed to the corn committee of the House of Lords by Sir William Pulteney. Family
 Keith married, on 26 August 1783, Helen, daughter of James Simpson, merchant, of Old Meldrum. She died on 8 January 1798. They had four sons and three daughters. The eldest son, James, born on 18 January 1788, became colonel in the British army, and died during the retreat from Cabul on 19 October 1839. Alexander, born on 13 November 1792, is known as a writer on biblical prophecy. John, born on 7 May 1797, was ordained assistant and successor at Keith-Hall on 3 May 1821, and succeeded to the charge on their father's translation. They wrote the account of the parish for the new Statistical Account of Scotland (1845).