Adeline \a-deli-ne, ad(e)-line\ as a girl's name is pronounced ADD-a-line, add-a-LEEN. It is of Old German origin, and the meaning of Adeline is "noble". See Adelaide. French diminutive of Adela. Used occasionally in England since the early 16th century. Opera soprano Adelina Patti (late 19th century) and a well-known song called "Sweet Adeline" gave the name exposure. See also Alena.
Adeline has 25 variant forms: Adalene, Adalina, Adaline, Adallina, Adalyn, Addie, Adelina, Adelind, Adella, Adellah, Adelynn, Adilene, Ahdella, Aline, Dahlina, Dalina, Daline, Dalina, Delina, Deline, Dellina, Delly, Delyne, Edelie and Lina.