William Kamkwamba (b. 1987)

As a teenager in Malawi, William Kamkwamba built a windmill from scrap materials to bring electricity and water pumping to his family's farm during a famine, teaching himself from library books. His story, told in 'The Boy Who Harnessed the Wind,' has inspired readers worldwide.

Wikipedia

More good people named William

• William Shakespeare
• William Wilberforce
• William Osler