James Watt died on August 19, 1819 at the age of 83.
Lauchlan Watt died in 1957.
Geoff Watt died in 1969.
Howard Watt died in 2005.
Bob Watt died in 2010.
Les Watt died in 1996.
Christian Watt died in 1923.
Ian Watt died in 1999.
Tommy Watt died in 2006.
Samuel Watt died in 1927.
Thomas Watt Hamilton died in 1996.
George Harvie-Watt died in 1989.
Elijah Watt Sells died in 1924.