A feminine given name, often used as a diminutive form of Katherine or Kate.
English diminutive of Katherine, which derives from Greek Aikaterine, possibly from katharos meaning 'pure' or from the goddess Hecate. The name evolved through Latin and French before entering English.
Katy Perry's real name is actually Katheryn, showing how this diminutive has become a standalone name. The spelling with 'y' instead of 'ie' became popular in the 20th century as parents sought more distinctive variations.
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