Clementine
1920s: from French clémentine, from the male given name Clément .
wiktionary
From French clémentine, named after French missionary Clément Rodier (1839–1904), who is said to have first bred it.
etymonline
clementine (n.)
"small citrus fruit, a cross between a tangerine and a sour orange," 1926, from French clémentine (1902). Originally an accidental hybrid said to have been cultivated from c. 1900 by (and named for) Father Clement Rodier in the garden of his orphanage in Misserghin, near Oran, Algeria. Introduced into U.S. and grown at Citrus Research Center in Riverside, California, as early as 1909.
Clementine (adj.)
1705, in reference to various popes who took the name Clement (see clement (adj.)). Saint Clement was a 1c. bishop of Rome. Clement VII was the first of the antipopes of Avignon. Especially in reference to the edition of the Vulgate issued due to Pope Clement VIII in 1592, which was the official Latin Bible text of the Catholic Church until late 20c.
Clementine
fem. proper name, fem. of Clement (see clement (adj.)).
