All around the world, 凯西 (Cathy 
, Casey 
, Kesy 
) is a widespread unisex first name. The forename 凯西 is habitual in Macao, where it is a common female name, the United States, where it is quite a common unisex name, and Hong Kong, where it is quite a common primarily girly, but scarcely male name (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in the United States, France, and Australia. Very seldom, 凯西 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Cathy | Democratic Republic of the Congo, France, China, United States, Australia |
| Casey | United Kingdom, France, China, United States, Australia |
| Kesy | Ireland, United Kingdom, France, United States, Australia |
| 凯西 | China |
Cacy, Carin, Cassie, Cat, Catalina, Catarina, Caterina, Cath, Catharina, Catharine, Catherine, Cathie, Cathryn, Ekaterina, Ekaterine, Iekaterina, Jekaterina, Jekatěrina, Kacey, Kaci, Kacie, Kacy, Kais, Kaisi, Karin, Kasey, Kassie, Kat, Katalin, Katalina, Katarina, Kataryna, Katarzyna, Kate, Katerina, Kateřina, Katharina, Kathe, Katherine, Kathi, Kathie, Kathy, Kati, Katia, Katie, Katja, Katriin, Katriina, Katrijn, Katrin,
凯西 is also a prevalent name for the fictitious and mythical characters: Casey Jones , the fictional Teenage Mutant Ninja Turtles character, Teenage Mutant Ninja Turtles: Out of the Shadows; Kathy Kane , the character appearing in DC Comics, Detective Comics; Casey Jones , the fictional Teenage Mutant Ninja Turtles character, created for the film script ''The Blue Door''; Casey Jones , the fictional character in the 1990–2007 Teenage Mutant Ninja Turtles film series and Casey Jones , the fictional character in the 1987–1996 Teenage Mutant Ninja Turtles animated television series, The Manhattan Project, Part 1, and in many other works.