Meaning and Name Origin
Kaileigh \ka(i)-lei-gh\ as a girls' name is of Irish and Gaelic origin, and the name Kaileigh means "slim and fair; slender". Kaileigh is a form of Cayla (Irish, Gaelic): from Caoilainn. Kaileigh is also a variation of Kaylee (Gaelic): from Caollaidhe.
Kaileigh has 35 variants: 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 and Kaylley.
Kaileigh is a rare first name for females. Kaileigh is a unique last name too for all people. (2000 U.S. Census)
Below is a charted comparison of the popularity of the girl name Kaileigh and affiliated names. Popular varying forms of Kaileigh (#unlisted) ranked in the Top 1000 are Kaylee (#52 last year), Kayla (#102), Callie (#186), Kayleigh (#278), Kailey (#476), Kaylie (#517), Caylee (#676), Kailee (#859), Kaleigh (#902), Kaylene, Kayley, Kayli, Kalie, Cayla, Kaley, Caleigh and Kayleen. Usage of these girl names was at its apex in the year 1999 and is now much lower, with forms such as Caylee, Kaleigh, Kailee, Caleigh and Kayley falling out of style. The most fashionable birth names among these are Callie (#186), Kaylee (#52), Kayleigh (#278), Kayla (#102) and Kailey (#476), with Callie having a resurgence in usage. (2014 Birth Statistics)
Kaileigh is pronounced similarly to Kailagh, Kelleigh and Kyleigh▲. Other suggested similar baby names are Baileigh, Haileigh, Karleigh and Raileigh. Like Kaileigh, these names are not frequently used.