Dorothée Sonia "Lally" Segard (née Vagliano) (4 April 1921 – 3 March 2018),[1] also known as Vicomtesse de Saint Sauveur, was a French amateur golfer.

In 1935, the two sisters, 13 and 14 years of age, competed abroad for the first time, when they took part in the British Girls Amateur Championship at Stoke Poges, Buckinghamshire, England.

In September 1937, she was back in England and won the British Girls Amateur Championship, defeating the two years older title holder Peggy Edwards, by 5 and 4 in the 18 hole final.

Along with Mrs. Henri Prunaret from United States, Segard initiated and planned the first women's world amateur team championship, the Espirito Santo Trophy, held in 1964 at Golf de Saint Germain, outside Paris, France.

At the 30 year anniversary of the 1964 Espirito Santo Trophy, an engraved commemorative silver heart jewel, signed by 19 of the all-time greatest French female golfers, including Catherine Lacoste, Brigitte Varangot, Anne-Marie Palli and Patricia Meunier-Lebouc, was offered to Segard.

[11] The other six women were HRH Princess Anne, Dame Laura Davies, Renee Powell, Belle Robertson, Louise Suggs and Annika Sörenstam.

They joined the existing 15 male honorary members, whom included President George H. W. Bush, Peter Thomson CBE, Jack Nicklaus, Arnold Palmer and Gary Player.