"Blend of Ada and Leigh"
The name Adaleigh is commonly a female name from the "English" origin.
Adaleigh is a modern American formation, first recorded in United States birth data in 2003. Its form joins the established given name Ada with the ending -leigh, an English surname element that also appears in recent coinages such as Kayleigh and Paisleigh. It is best described as a blend of those two elements rather than as a name carried over from an older naming tradition in another language.
The pronunciation of Adaleigh is AD-uh-lee.