William Maxwell Stewart
c.1874 Born son of William Stewart, coal master, and his wife Isabella nee Sinclair.
1891 Living in Old Kilpatrick, Dunbartonshire, William Stewart 50, coal merchant and his wife Isabella Stewart 49, with children Christina 26, Alexander 25, electrical engineer, Helen M 22, Ida S 20, William M 17, apprentice electrical engineer, Frederick C 13[1]
1900[2] /1908[3] With his 2 brothers, Frederick Charles Stewart and Alexander William Stewart, founded Thermotank
1901 Electrical engineer living with his mother and father in Old Kilpatrick, Dunbartonshire[4]
1926 William Maxwell Stewart died; of Lochbrae House, Bearsden, Dunbartonshire; executors Alexander William Stewart and Frederick Charles Stewart[5]
1940 Death of his son, William Alexander Frederick Stewart[6]