Jeanne was a very popular name in France in the early 1900's, and after a brief period of unpopularity, it has made a comeback. It is apparently the 2nd most common name given to girls born in the 20th century, probably because it was ranked very high on yearly popularity charts for quite a while.
http://members.societe-jersiaise.org/geraint/jerriais/noms1ers.html