Pure or to rejoice
Kayia is a modern phonetic variation likely derived from the Greek name Katherine, meaning pure, or the Latin name Gaia, referring to the earth. It may also be a stylized version of the Scandinavian name Kaia, which is a diminutive of Kaja, meaning to rejoice. Its usage in the United States is contemporary and relatively rare.
Less common today
Kayia isn't in the latest US Top 1000. It last peaked at #7,212 in 1990.
US births per 5-year period, 1990βpresent (SSA data).