Kayleigh Rose Amstutz, professionally known as Chappell Roan, is an American singer, well-known for her songs "Good Luck, Babe!", "Pink Pony Club", and "Casual", the latter two being on her album 'The Rise and Fall of a Midwest Princess', as well as opening a number of shows for Olivia Rodrigo's Guts World Tour. She has stated that she's never felt connected to the name Kayleigh.
Kayleigh McKee is an American voice actress, known for her work on anime dubs for IYUNO-SDI, Crunchyroll, Bang Zoom! Entertainment, NYAV Post, and Studiopolis. Some of her noteworthy roles include Matthias Hildesheimer in The Strongest Sage With the Weakest Crest and Yuta Okkotsu in Jujutsu Kaisen 0.
This spelling is found in the Marillion song 'Kayleigh'. I found out something of the origin of the song title in a copy of Classic Rock magazine's Top 100 Rock albums (April 2006) It was an interview with the lead singer, he wrote the song about a break up with his then girlfriend and he just combined her first and last names to create the song title Kay & Leigh. Perhaps this spelling is where it originated, the song was written around 1985 I think. after that it seems it became very popular to give your name that child. Hope this helps, Andy.