Meaning and name origin
Clemence \c-lemen-ce, cl(e)-me-nce\ as a girl's name is of Latin origin, and the meaning of Clemence is "mercy". Medieval French and English form of Clementia, a derivative of Clemens (see Clement). Clemency is a direct use of the noun similar to names such as Charity, Faith, and Mercy.
Clemence is not a popular first name for females but a very popular surname or last name for all people (#41099 out of 88799, Top 46%) (2000 U.S. Census).
Displayed below is a comparison of the popularity of the girl name Clemence and its variant forms. Popular variation forms ranked in the Top 1000/100 are Faith (#81), Mercy (#940), Clementine (#943), Clemmie, Charity and Clementina. (2014 statistics).
A suggested similar baby name is Clymene. Like Clemence, this name is not commonly used.