Kay: Meaning of Baby Name Kay

About the Name Kay

Kay is recorded here as a Native American name from the Hopi tradition, meaning "elder sister" — a meaning that reflects the Hopi practice of using kinship roles as given names, honoring the position a child holds within the family structure. In broader English use Kay also functions as a short form of Katherine and related names, as a standalone name in the Arthurian tradition (Sir Kay was one of King Arthur's knights), and as an informal letter-name. This multiplicity of origins gives Kay an unusual richness: a name that arrived in American use from several directions at once, each carrying its own cultural freight.

Kay first entered the US Social Security top-1000 in 1936 and rose to its peak rank of #70 in 1941, at the height of World War II-era naming when short, self-sufficient names for women carried particular appeal. The name remained in the top-1000 through 1945, last ranking at #91 with 3,058 births, accumulating 31,874 total tracked births across its decade of presence.

Today Kay reads as a quintessential mid-century American name for women — single-syllable, decisive, and free of ornamentation. It shares its generational space with Jo, Pat, and Sue, a cohort of brief, practical feminine names that feel more retro than vintage to contemporary ears. Recorded variants span a remarkably diverse family: Kai, Kayana, Kaye, Kayla, Kaylee, and Kaylin — forms that reflect both the traditional and modern extensions of the Kay sound.

Source: U.S. Social Security Administration name data, 1880–2024 (methodology). By Marvin Tang.

Quick Facts About Kay

585

Native American baby names in our dictionary

259

Native American female names

16

3-letter K-names in our dictionary

598

K-female names total

1936–1945

years of US SSA records (10 total)

31,874

total US births named Kay (all years)

US Popularity History (1936–1945)

↘️ Falling: Kay dropped 14 places in the US girls ranking over the last 5 years (#77 in 1940 → #91 in 1945).

Annual US births named Kay by gender, from US Social Security Administration records. Peak year: 1942 with 3,623 girls named Kay (girl rank #75 that year).

Where it stands today: in 1945, ranked #91 for girls (3,058 US births). That's 16 places below its 1942 peak.

Source: US Social Security Administration. Limitations: US birth-certificate data only; names appearing fewer than 5 times in a given year are suppressed for privacy; spelling variants are counted separately. For names that ranked outside the US top 100 before year 2000, only the years they reached the top 100 are shown — the chart may have gaps for less-popular historical names.

Variant Forms

Name	Meaning	Gender	Origin
Kai	Unisexual Name Meaning "The Sea."	Female	Hawaiian
Kayana	Variants Of Kay Keeper Of The Keys: Pure	Female	English
Kaye	Variants Of Kay Keeper Of The Keys: Pure	Female	English
Kayla	Variant Of Kay. Keeper Of The Keys: Pure. Also Kayla Is A Character On Daytime TV Days Of Our Lives.	Female	English
Kaylee	Variant Of Katherine. Pure. Variant Of Kay And Kayla Keeper Of The Keys: Pure.	Female	English
Kaylin	Variant Of Kay And Kayla. Keeper Of The Keys: Pure.	Female	English

Looking for names like Kay?

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Side-by-side popularity charts and crossover years for Kay against today's most popular girls-name peers (top 8 by US births in the last 10 years of SSA records).

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