My ggggg grandmother was Jean Nish who married David Thomson in 1791. She was born in Muthill on 7 Feb 1772. James her brother was born 3 July 1770 in Muthill also and their parents were George Nish and Jean Murray in which were married in Perth,Scotland on 21 Jan 1754. James was your George Nish's dad. James married Janet Bayne on 22 July 1803 and your George was born 3 Jan 1805. Then George married Margaret Steven on 15 Feb 1833. I hoped that information helped. I am now research George Nish and Jean Murrays birthdates and places of birth.