William John Kerr
William John was born on March 13th, 1737.  He died at the age of 78 in 1815.

 Elizabeth Fortescue
Elizabeth was born after 1743.  She died on September 30th, 1780.

 William Kerr
William was born on October 4th, 1763.  He died at the age of 60 on April 27th, 1824.

 Mark Robert Kerr
Mark Robert was born on November 12th, 1776.  He died at the age of 63 on September 9th, 1840.