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Sir Frederick Stewart (1879-1950)
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 Stewart 13
1901 Coal merchant living with his mother and father in Old Kilpatrick, Dunbartonshire
1950 Obituary 
"SCOTLAND has lost one of her prominent industrialists by the death of Sir Frederick Charles Stewart, which occurred at 8, Lancaster Crescent, Glasgow, on March 10th. Although he was closely concerned with many engineering and other companies. Sir Frederick will probably be remembered best as the chairman of Thermotank, Ltd., the firm which he founded in collaboration with his two brothers in 1908.
Frederick Charles Stewart, who was born in 1879, was the son of the late Mr. William Stewart, of Blair Atholl. He was educated at the High School, Glasgow, and as a young man was for a time in business with his father as a coal merchant in Dalmuir. But he was soon attracted to the engineering industry and with his brothers, Alexander and Maxwell Stewart, started the business to which he devoted the greater part of his energy and skill throughout the remainder of his life. From the first Thermotank Company. there has developed the present orgamsation, with subsidiaries in South Africa and Canada, which is well known for its production of ventilating equipment for ships of all classes, railway rolling stock and aircraft. Sir Frederick's engineering interests, however, were not wholly confined to the company which he founded. He was chairman of the North British Locomotive Company, Ltd., and of Kelvin Bottomley and Baird, Ltd., deputy chairman of Brown Brothers and Co., Ltd., Edinburgh, and a director of William Baird and Co., Ltd. Other commercial concerns which claimed a share of his time and ability were the Midland Bank, the Clydesdale and North of Scotland Bank, the Eagle Star Insurance Company, Ltd., Scottish Industrial Estates, Ltd., and Hillington Industrial Estates, Ltd., of all of which he was a director. Sir Frederick took a leading part in the public and industrial life in the West of Scotland, and was a member of the Clyde Navigation Trust, a director of the Glasgow Chamber of Commerce, and of the Merchants House. He also served on the Glasgow Committee of Lloyd's Register of Shipping and was a member of the Company of Shipwrights. In recognition of his public and industrial service, the honour of knighthood was conferred upon him in 1944, in which year he also became a Deputy Lieutenant of Dumbartonshire. In the first world war Sir Frederick served with the 9th Argyll aud Sutherland Highlanders, from which he retired with the rank of colonel in 1921.
But his interest in the affairs of the Territorial Army was maintained by his chairmanship of the Dumbartonshire Territorial Association, and his presidency of the Dumbartonshire Cadet Corps..... " Read more.