"Variant of Cyrus"
The name Cy is commonly a male name from the "Persian" origin.
Cy is a short form of the English given name Cyrus, which reached English through Greek Kuros and ultimately from Old Persian Kurush. It is recorded as a given name in its own right rather than only as an informal nickname.
Cyrus means "Lordly ruler|a gem".
The pronunciation of Cy is SY.