Cy is a contracted form (English) of the Czech, English, German, and Slavic name Cyril.
Cy is also a contracted form (English) of the English and Iranian name Cyrus.
Cy is not commonly used as a baby boy name. It is not in the top 1000 names. In 2018, out of the family of boy names directly related to Cy, Cyrus was the most frequently used.
† Pronunciation for Cy: S as in "see (S.IY)" ; AY as in "side (S.AY.D)"