Kailei is of Hawaiian origin and means "sea". It is often used as a female given name, reflecting its connection to the beauty and power of the ocean.
"The name Kailei experienced significant growth in popularity between 1998 and 2007, with a peak of 34 births in both 2004 and 2007. However, there has been a steady decline since then, with only 13 births recorded each year from 2021 to 2023."