Meaning and name origin
Kaileigh \ka(i)-lei-gh\ as a girl's name is of Irish and Gaelic origin, and the meaning of Kaileigh is "slim and fair; slender". Kaileigh is a variant of Cayla (Irish, Gaelic): from Caoilainn. Also a variant of Kaylee (Gaelic): from Caollaidhe.
Kaileigh has 35 variant forms: Caela, Caila, Caileigh, Cailey, Cailie, Caleigh▼, Caley, Callie▲, Caylee▼, Cayleigh, Cayley, Caylia, Caylie, Kaelee, Kaeleigh, Kaeley, Kaeli, Kaelie, Kailee▼, Kailey▼, Kaili, Kailie, Kalee, Kaleigh▼, Kaley▼, Kalie, Kayla▲, Kaylea, Kaylei, Kayleigh▲, Kayley▼, Kayli▼, Kaylie▲, Kaylleigh, Kaylley.
Kaileigh is not a popular first name for females and an equally uncommon surname or last name for all people (Source: 2000 U.S. Population Census).
Displayed below is a comparison of the popularity of the girl name Kaileigh and its variant forms. Popular variation forms ranked in the Top 1000/100 are Kaylee (#52), Kayla (#102), Callie (#186), Kayleigh (#278), Kailey (#476), Kaylie (#517), Caylee (#676), Kailee (#859), Kaleigh (#902), Kayli, Kayley, Kaley, Cayla, Caleigh and Kalie. (Source: 2014 Birth Name Statistics).
Kaileigh is also pronounced similarly to Kailagh, Kelleigh and Kyleigh▲. Other suggested similar baby names are Baileigh, Haileigh, Karleigh and Raileigh. Like Kaileigh, these names are not commonly used.