Maurice Galbraith Cullen was born in 1866.
Bob Sheldon was born on 1950-11-27.
Sheldon Souray was born on July 13, 1976.
In the 2010 episode, "The Einstein Approximation," Leonard is asked how long Sheldon has been stuck. Leonard replies, "Emotionally, thirty years." This would place his birth year about 1980. In "The Peanut Reaction," Penny refers to Sheldon as a "typical Taurus" -- placing his birth time at between April 20 and May 20.
Yes, he has a little sister, Bernadette Galbraith.
Nancy Galbraith was born in 1951.
Alexander Galbraith was born in 1883.
Jean Galbraith was born in 1906.
Percy Galbraith was born in 1898.
Barry Galbraith was born in 1919.
Paul Galbraith was born in 1964.
Catherine Galbraith was born in 1913.
Colin Galbraith was born on 1973-##-09.
Maurice Galbraith Cullen was born in 1866.
Jade Galbraith was born on March 2, 1982.
David Galbraith was born on 1983-12-20.
John Galbraith Graham was born in 1921.