George Williams, English philanthropist, founded the YMCA (d. 1905)

Sir George Williams (11 October 1821 – 6 November 1905) was an English philanthropist, businessman and founder of the Young Men's Christian Association (YMCA). The oldest and largest youth charity in the world, its aim is to support young people to belong, contribute and thrive in their communities.Williams was knighted by Queen Victoria in her 1894 Birthday Honours. He died in 1905 and is buried in St Paul's Cathedral.

He is the great-great-grandfather of current British Prime Minister Boris Johnson.