Little saint or reed
Kayna is a name with dual roots, most notably as a Cornish variant of Keyne, referring to a 5th-century saint. It is also sometimes associated with the Arabic word for a musical instrument or reed. In modern usage, it is often chosen for its sleek, contemporary sound.
Less common today
Kayna isn't in the latest US Top 1000. It last peaked at #5,682 in 1996.
5th-century Cornish princess and saint
US births per 5-year period, 1990βpresent (SSA data).