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Kay as a masculine name has diverse origins. It can be a short form of names like Kenneth or Kai, or derive from the Middle English word 'key.' In Arthurian legend, Sir Kay was King Arthur's foster brother and seneschal, lending the name a noble, medieval connection. It's also associated with the Old Norse name Kái, meaning 'rejoice.' This brief, one-syllable name has maintained steady but modest usage throughout the decades. Its simplicity and strong sound make it appealing for those seeking a straightforward yet distinctive name for a boy. Kay also has cross-cultural appeal, appearing in various forms in Germanic, Celtic, and Scandinavian traditions.

Gladiola nn Dolly?

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The name Kay peaked for boys at #448 in 1934. Kay is occasionally used for girls in 2025.

Caius

Gaius

The name Kay is a girl's name of English origin meaning "pure".

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Kay, a cigarette-smoking, nightclubbing name of the 1930's, could be ready for a comeback along with cousins May/Mae and Ray/Rae. 
 Kay has been out of sight since the mid-eighties, but was in the double digits from 1936 to 1945, attached to several glamorous actresses of the period, such as fashion plate Kay Francis, as well as Eloise author Kay Thompson.
 Kay was also once a unisex name, as in Sir Kay, in Arthurian legend one of the Knights of the Round Table.
 Bottom line: Parents in search of a fresh, more cosmopolitan alternative to Kate might consider Kay..

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The name Kay peaked for girls at #70 in 1941. The name is most popular in Indiana, Illinois, and Ohio. Kay is occasionally used for boys in 2025.

Katherine

Year	US rank	Births	Per million
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Kay

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