Alexander McTaggart married Margaret Lawson (sorry no place or dates known):-
Their son James McTaggart born about 1798 Scotland, married Elizabeth Brown. died before 1867 Scotland.
James (a Shoemaker) died 1866 Glasgow, Scotland.
Son John McTaggart born abt.1838 Barony Glasgow Scotland. He changed his name to Taggart when he joined the army as he was underage.John married Sarah Ann Coutts 1867 in Aberdeen.He served in India where my grandmother was born. died 1922 Royal Chelsea Hospital, London.
Would love to get further back than Alexander and Margaret.