This short-but-strong name is popular for boys in The Netherlands. While Cass is usually a female name in the U.S., it feels just as right for boys.

Rather imperious as a baby name, but has an interesting history. Imperia is the name of an obscure French saint, also known as Impère and Impérie, also borne by the famous Italian courtesan Imperia Cognati. Honoré de Balzac later used it in his short story La belle Impéria (1832), where it belongs to a fictional courtesan. A similar name, Bel-imperia, was used by Elizabethan dramatist Thomas Kyd for a character in his play The Spanish Tragedy.