Amélie Rose Françoise Gex, was a Savoyard writer and poet who created works in French and Franco-Provençal (Arpitan). Until 1880, she published most of her writings under the pen name Dian de la Jeânna.
Amélie Gex was the daughter of the physician  and winemaker  Marc-Samuel Gex. Her mother died when she was 4 years old. She first lived in Chambéry then Challes-les-Eaux with her grandmother. At fourteen, she moved back to La Chapelle-Blanche with her father.
Upon the formation of the Kingdom of Italy in 1861, Gex, like many Liberals who preferred the Italian Cavour to Napoleon III of France, supported King Victor Emmanuel II. She later became Republican, and entered politics, writing speeches in dialect to better speak to rural voters.
Gex began writing during the years 1872-75. After the death of her
father in 1876, she operated her family's estate, then returned to live
in Chambéry, where she lived modestly.
In 1877, the Republican newspaper Le Père André  began publishing her poetry under the nom de plume Dian de la Jeânna ("John son of Jane"). She continued publishing under this name in Le Père André from March 1879 until May 1880, then in L'Indicateur savoisien from 1879 to 1882.
Her poems are devoted to vineyards, farmers and the Savoy. They evoke
the harvest, threshing with a flail, and the cycles of nature that
motivate people to work.
Gex also wrote short stories. In "Dit de la couleuvre" ("Tale of the Snake"), she reworks the story of the Queen of Sheba, who rode a flying serpent to marry Solomon. In "Dit du Château mort" ("Tale of Castle Death"), she evokes a pagan country castle near Mont Blanc
haunted by a flaming sword turning in the air. Deciding that politics
should give way to work, she also strove to write stories in French to
expand her readership.
In 1882, she was honored by the Academy of Savoy for her work.
She died of an illness in 1883.