Royal meadow or cynes island
Kynsie is a modern phonetic variant of the English surname-name Kinsey. It derives from the Old English elements 'cyne', meaning royal, and 'sige', meaning victory, or alternatively from a place name meaning 'Cyne's island'.
Less common today
Kynsie isn't in the latest US Top 1000. It last peaked at #9,472 in 2012.
US births per 5-year period, 1990βpresent (SSA data).