Meaning and Name Origin
Cayleigh \ca(y)-lei-gh\ as a name for girls means "slim and fair; slender". Cayleigh is a variant of Cayla (Irish, Gaelic): from Caoilainn. Cayleigh is also a variant of Kaylee (Gaelic): from Caollaidhe.
Cayleigh has 35 variants: Caela, Caila, Caileigh, Cailey, Cailie, Caleigh▼, Caley, Callie▲, Caylee▼, Cayley, Caylia, Caylie, Kaelee, Kaeleigh, Kaeley, Kaeli, Kaelie, Kailee▼, Kaileigh, Kailey▲, Kaili, Kailie, Kalee, Kaleigh▼, Kaley▼, Kalie, Kayla▲, Kaylea, Kaylei, Kayleigh▲, Kayley▼, Kayli▼, Kaylie▲, Kaylleigh and Kaylley.
Cayleigh is an unusual first name for females. Cayleigh is also an unusual surname for both adults and children. (2000 U.S. Census)
Below is a charted comparison of the usage of Cayleigh and associated names. Prominent varying forms of Cayleigh (#unlisted) ranked in the Top 1000 are Kaylee (#52 in 2014), 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 reached its apex in 1999 and is now much less, with forms such as Caylee, Kaleigh, Kailee, Caleigh and Kayley falling out of style. The more fashionable girl names in this compilation are Callie (#186), Kaylee (#52), Kayleigh (#278), Kayla (#102) and Kailey (#476), with Callie having a rebound in popularity. (2014 Birth Statistics)