Kay - Name Meaning and Origin

The boy's and girl's name Kay \kay\ is of Latin and Old Welsh origin, and its meaning is "happy, rejoicing". From Gaius. Ancient name borne, in legend, by a knight of the Round Table. Now more common as a woman's name.

Kay has 2 variant forms: Kai and Keh.

For more information, see also related names Keyes and Caius.

Baby names that sound like Kay are Kaye, Gay and Key.

Kay is a very rare male first name and a very popular surname (source: 1990 U.S. Census). Displayed below is the baby name popularity trend for the boy's name Kay. Click here to compare Kay with related baby names.