William Harbutt Dawson was a British journalist, civil servant and author, and an acknowledged expert on German politics and society.

William Harrison Ainsworth was an English historical novelist born at King Street in Manchester. He trained as a lawyer, but the legal profession held no attraction for him. While completing his legal studies in London he met the publisher John Ebers, at that time manager of the King's Theatre, Haymarket. Ebers introduced Ainsworth to literary and dramatic circles, and to his daughter, who became Ainsworth's wife.

William Harvey was an English physician who made influential contributions in anatomy and physiology. He was the first known physician to describe completely, and in detail, the systemic circulation and properties of blood being pumped to the brain and the rest of the body by the heart, though earlier writers, such as Realdo Colombo, Michael Servetus, and Jacques Dubois, had provided precursors of the theory.

William Hayley was an English writer, best known as the biographer of his friend William Cowper.

William Hazlitt was an English essayist, drama and literary critic, painter, social commentator, and philosopher. He is now considered one of the greatest critics and essayists in the history of the English language, placed in the company of Samuel Johnson and George Orwell. He is also acknowledged as the finest art critic of his age. Despite his high standing among historians of literature and art, his work is currently little read and mostly out of print.

William Henry Babcock (1849–1922) was an American author and poet. He was born in 1849 in St. Louis, the son of Jonathan Wells Babcok and Catharine Babcock. In 1874 he married Ann Johns Earle, having at least 5 sons and 6 daughters. He died Washington, DC, in 1922.

William Henry Drummond was an Irish-born Canadian poet whose humorous dialect poems made him "one of the most popular authors in the English-speaking world," and "one of the most widely-read and loved poets" in Canada.

William Henry Furness was an American clergyman, theologian, Transcendentalist, abolitionist, and reformer.

William Henry Giles Kingston, often credited as W. H. G. Kingston, was an English writer of boys' adventure novels.

William Henry Hudson – known in Argentina as Guillermo Enrique Hudson – was an Anglo-Argentine author, naturalist and ornithologist.