In 1874 he married
Lucy Madox Brown, daughter of the painter
Ford Madox Brown. They honeymooned in France and Italy. Their first child,
Olivia Frances Madox, was born in September 1875, and her birth was celebrated in an ode of Swinburne's. A son, Gabriel Arthur, was born in February 1877, followed by another daughter,
Helen Maria, in November 1879, and twins, Mary Elizabeth and Michael Ford, in April 1881. Rossetti and his wife did not have the children baptized, nor were they raised in a Christian household. The children were schooled at home by their mother and governesses. Their son Michael died in infancy. In 1897, Olivia married an Italian anarchist refugee, Antonio Agresti. They later moved to Italy, where Olivia became a translator and writer. After she was widowed in 1926, she became an associate of
Ezra Pound, and the two corresponded frequently. Gabriel Arthur, known as Arthur to the family, became a scientist, married Dora Lewis, and had several children. Helen became a painter of miniatures, and in 1903 married Gastone Angeli. He was in fragile health and died only a few months later. Helen gave birth to his posthumous daughter, Imogen Lucy, in 1904. In 1903, Helen and Olivia also published
A Girl Among the Anarchists under the pseudonym 'Isabel Meredith'; the novel is a fictional recounting of their experiences in the anarchist movement. William Michael Rossetti died on 5 February 1919 aged 89 and is buried in the Rossetti family grave on the west side of Highgate Cemetery. In the grave he joined his father, mother,
Elizabeth Siddal (wife of his brother Dante) and his sister Christina. The ashes of his son Gabriel Arthur Maddox were interred in the grave in 1932 and three other members of the Rossetti family have also been buried there subsequently. ==Partial bibliography==