John Dewar (6 January 1805 - January 1880) was a Scottish businessman who founded John Dewar & Sons, Scotch whisky distillery in 1846.
In 1845 he married Jane Gow with whom he had the following sons:
John (1849–1852)
James Gow (1852–1922)
Alexander (1854–1855)
John Alexander (1856–1929)
Charles (1858–1933)
Arthur (1860–1917)
Thomas Robert (1864–1930)On his death, sons Thomas and John took over management of the business.