In 1901, Clews was married to a New York socialite Louise Hollingsworth (née Morris) Gebhard (1877–1936). Louise, the daughter of John Boucher Morris and Louise Kittera (née Van Dyke) Morris, was recently divorced from
Frederick Gebhard. Before Henry and Louise divorced, they were the parents of: • Henry Clews III (1903–1983) •
Louise Hollingsworth Morris Clews (1904–1970), who first married Hon. Andrew Nicholas Armstrong Vanneck (1890–1965) in 1930. They divorced in 1933 and she married
Ian Campbell, 11th Duke of Argyll in 1935 and became the
Duchess of Argyll. They divorced in 1951 and she remarried for the third time to Robert Clermont Livingston Timpson (1908–1988), an American investment banker, in 1954. They moved into
Grasmere, a mansion in
Rhinebeck, which she later opened to the public. Henry met his second wife, Elsie "Marie" (née Whelan) Goelet (1880–1959), at a New York social function and they married in 1914. Clews' second wife had been recently divorced from
Robert Wilson Goelet, a wealthy Newport businessman from a prominent
family. His sister was
Mary Innes-Ker, Duchess of Roxburghe. Shortly after their marriage, the couple moved to Paris. They were the parents of one child: • Mancha Madison Clews (1915–2006), who became an electrical engineer. After the outbreak of
World War I, they moved with their young son to the
Château de la Napoule, a medieval chateau along the
French Riviera. During their two decades together in residence at the chateau, in addition to the reconstruction and the creation of art, they also hosted elaborate parties for European society and American expatriates. The local villagers were not forgotten by the Clews, who built a fisherman's beach with harbour and arranged for religious services and other events on the chateau grounds for people in the town. When Henry died in 1937 the funeral procession included virtually the entire village. == Posthumous art preservation ==