The unique given name Mckaylie is of Scottish origin, derived from the surname McKay, which means 'son of the bright-headed one'. It is a modern invention, created as a female counterpart to the established masculine form McKay. The name Mckaylie is composed of two elements: 'Mc', meaning 'son of', and 'Kay', which refers to someone with bright hair or head. This charming name first appeared in the late 20th century and has since gained some popularity, particularly in English-speaking countries.
"The name Mckaylie saw a consistent popularity between 1995 and 2009, with an average of 5 to 6 births per year. There was a notable spike in 2006 with 9 births."