Aleigh, pronounced /əˈliː/ is an uncommon feminine given name of unknown origin, perhaps originating as a respelling of Alyce or Alice. It has been used sparingly throughout the 20th century, but its popularity has declined in recent decades.
"Interestingly, the name Aleigh peaked in popularity between 2000 and 2004, with over 30 births each year during this period. However, it has seen a steady decline since then, with fewer than 15 births annually from 2016 onwards."