What does Kay mean?
Kay \kay\ as a boys' name (also used as girls' name Kay) is of Latin and Old Welsh origin, and the meaning of Kay 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 is an unusual given name for males but a very prominent last name for both adults and children (#1402 out of 150436, Top 1%). (2000 U.S. Census)
Displayed below is the baby name popularity of Kay for boys. Kay was first listed in 1920-1929 and reached its peak position of #572 in the U.S. during 1930-1939, but is not listed at the moment. (Top 1000 Baby Names Records, 2014)
Kai (#177 the previous year) is the only other popular varying form of Kay. These boy names are at the peak of their popularity today (usage of 0.4115%), except for the version Kay which has become less in vogue. Kai (#177) is the most fashionable baby name in this compilation. Below is a charted analysis of the usage of Kay and affiliated names. (Top 1000 Baby Names Records, 2014)
Kay▼ is alike in pronunciation to Caw, Cayo, Coy▼, Key, Koa and Kye. Other suggested similar baby names are Bay, Day, Fay▼, Gay, Jay▼, KC, Kacy, Kaj, Kam, Kaz, Klay, Ray▼, Tay and Way. These names tend to be more frequently used than Kay.