[ 2 syll. cas-sie, ca-ss-ie ] The baby girl name Cassie is also used as a boy name, though it is far more popular for girls. It is pronounced KAES-iy- †. Cassie has its origins in the Old Greek, Latin, and Celtic languages. It is used largely in English and Greek.
Cassie is an English and Greek familiar form of the English and German Cassandra.
Cassie is also a familiar form of the English Cassia.
Cassie is also a form of the English Cassidy.
Cassie is also a familiar form of the English Katherine.
Cassie is rare as a baby girl name. At the modest peak of its usage in 1982, 0.121% of baby girls were named Cassie. It was #137 in rank then. The baby name has suffered a substantial decline in popularity since then, and is used only on an infrequent scale now. In 2018, out of the family of girl names directly related to Cassie, Katherine was the most regularly used. Cassie has primarily been a baby girl name in the last century.
† Pronunciation for Cassie: K as in "key (K.IY)" ; AE as in "at (AE.T)" ; S as in "see (S.IY)" ; IY as in "eat (IY.T)"