French author Louis-Ferdinand Destouches, the author of Journey to the End of the Night, used Céline, a French female first name as his pen name. Any idea where he got it from?
According to the entry LOUIS-FERDINAND CÉLINE, De Destouches à Céline in the online Encyclopædia Universalis,
c'est à sa grand-mère maternelle, Céline Guillou, qu'il empruntera son nom de plume
Literal translation: "it is from his maternal grandmother, Céline Guillou, that he will borrow his pen name".
In the French Wikipedia article about the author, the first footnote points out that "Céline"
(...) est le prénom de sa grand-mère et l'un des prénoms de sa mère. cf.Pol Vandromme, Céline, Pardès, 2001, p. 114
In other words, it is the first name of his grandmother and one of his mother's names.