Delphine was born in Provence, France, in 1284. Left an orphan in her infancy, she was placed under the guardianship of her uncles, and under the direction of her aunt, the Abbess of St. Catherine of Sorbo. She grew up in the practice of every virtue and took a vow of virginity which she kept faithfully to the end of her life.
In her twentieth year she was married to Elzéar, Count of Sarban, and the couple, having received the habit of the Third Order of St. Francis, lived together in the edifying practice of prayer, penance, and charity towards the poor until the death of St. Elzéar in 1323. Delphine accompanied Elzear to Naples in 1317 and became a companion to Queen Sanchia, a position she continued after the death of her husband on a diplomatic mission to Paris in 1323. When Queen Sanchia’s husband, King Robert, died, the queen became a nun at a Poor Clare monastery in Naples, and Delphine remained with her until her death, when she returned to Provence. She gave most of her wealth to the poor and lived as a recluse, at first at Carbrieres and then at Apt.
During the last years of her life she endured the greatest sufferings without the slightest complaint or sign of impatience. The cult that had long been paid to Blessed Delphine was confirmed by Pope Urban V, godson of St. Elzéar.
Delphine died in 1360 and was buried with her husband at Apt.
In their supplement to the Martyrology, Blessed Delphine is named on December 9, though she appears to have died on November 26th.
Source:
https://en.wikisource.org/wiki/Catholic_Encyclopedia_(1913)/Bl._Delphine
https://www.catholic.org/saints/saint.php?saint_id=508