Kaysie

Q: What does Kaysie mean?

Kaysie is a girls' name of Irish origin, meaning “vigilant”, variant of Casey, from the surname O Cathasaigh. A respelling of Casey, from the Irish surname O Cathasaigh, based on cathasach 'vigilant'.

Gender: Girl
Say it: KAY-see
Origin: Irish
US rank, 2025: #8,858 for girls

Kaysie is a girls' name of Irish origin, meaning “vigilant”. In 2025 it ranked 8,858th for girls in the US (11 babies).

What does Kaysie mean?

Irish: variant of Casey, from the surname O Cathasaigh

“vigilant”

A respelling of Casey, from the Irish surname O Cathasaigh, based on cathasach 'vigilant'.

Is Kaysie a girl's or a boy's name?

Kaysie is a girls' name. In 2025, it was given to 11 girls in the US. Too few boys were given it to be listed.

How popular is Kaysie in the UK?

No girls in the UK were given it in 2025, or too few to be listed. Its busiest year was 2007, with 16 girls.

Half of all the girls named Kaysie in the UK since 1996 were born between 2005 and 2010, the years shaded on the chart below.

1996Busiest: 16 in 20072021

Kaysie in the UK, year by year

Year	Girls	Rank
2021	1	#7,491
2020	0	–
2019	0	–
2018	2	#7,433
2017	0	–
2016	0	–
2015	0	–
2014	7	#3,321
2013	4	#4,953
2012	9	#2,887
2011	11	#2,393
2010	12	#2,234
2009	11	#2,298
2008	16	#1,745
2007	16	#1,694
2006	14	#1,764
2005	15	#1,608
2004	10	#2,064
2003	0	–
2002	4	#3,556
2001	5	#2,928
2000	4	#3,399
1999	0	–
1998	4	#3,310
1997	8	#2,073
1996	3	#3,935

How popular is Kaysie in the US?

Rank in 2025: 8,858th among girls
Babies in 2025: 11 about 1 in 150,000 girls
Five-year trend: Falling down 48% in five years
Same name in a class: under 1% chance among 15 girls

In 2025, 11 girls in the US were named Kaysie, making it the 8,858th most popular name for girls. Five years earlier, in 2020, it was 5,483rd. Its busiest year was 1990, with 56 girls. It first appears in the records in 1972.

Half of all the girls named Kaysie in the US since 1880 were born between 1990 and 2008, the years shaded on the chart below.

1972Busiest: 56 in 19902025

Kaysie in the US, year by year

Year	Girls	Rank
2025	11	#8,858
2024	8	#11,117
2023	11	#8,984
2022	14	#7,626
2021	16	#6,962
2020	22	#5,483
2019	21	#5,794
2018	15	#7,405
2017	18	#6,527
2016	17	#6,898
2015	29	#4,724
2014	16	#7,300
2013	21	#6,014
2012	22	#5,892
2011	21	#6,145
2010	25	#5,412
2009	23	#5,889
2008	22	#6,127
2007	38	#4,049
2006	30	#4,684
2005	34	#4,114
2004	26	#4,945
2003	20	#5,790
2002	33	#3,885
2001	33	#3,860
2000	31	#3,978
1999	41	#3,145
1998	32	#3,645
1997	34	#3,362
1996	42	#2,845
1995	34	#3,280
1994	37	#3,093
1993	38	#3,047
1992	36	#3,139
1991	34	#3,201
1990	56	#2,253
1989	35	#3,039
1988	34	#2,982
1987	29	#3,166
1986	23	#3,643
1985	16	#4,633
1984	23	#3,526
1983	26	#3,150
1982	21	#3,779
1981	21	#3,738
1980	11	#5,911
1979	6	#9,008
1978	13	#4,931
1977	10	#5,886
1976	8	#6,609
1975	11	#5,159
1974	5	#8,773
1973	5	#8,421
1972	9	#5,479

Nicknames for Kaysie

Kay 3 girls in the UK in 2025

Names like Kaysie

Names given in the same years and the same naming tradition, with a similar sound.

Keira, Caoimhe, Kiara, Erin, Cassidy, Aoife, Eden, Niamh, Maeve, Jasmine, Teagan, Bree

Names related to Kaysie

Kasey, Kassie, Kaysha, Kasie, Kaysi, Kaisy

More Irish names

Oscar, Rowan, Rory, Finn, Aiden, Ryan, Nolan, Quinn, Orla, Cody, Ronan, Connor, Declan, Casey, Kennedy, Callan

Every Irish name

Sources

Figures from Baby names in England and Wales (Office for National Statistics), Babies' first names (National Records of Scotland), Baby names (Northern Ireland Statistics and Research Agency) and Popular Baby Names (US Social Security Administration). Nameling last updated them on 20 October 2026. How the figures are worked out, and the data to download.

To cite this page: Nameling, “Kaysie: name meaning, origin and popularity”, https://www.nameling.co.uk/names/kaysie, updated 20 October 2026.