Cousin or kinsman; from the kings meadow
Kinslie is a modern American spelling variant of the English surname Kingsley. It derives from the Old English elements cyne, meaning royal or kingly, and leah, meaning a meadow or clearing. While its roots are ancient, this specific spelling is a contemporary creation.
Less common today
Kinslie isn't in the latest US Top 1000. It last peaked at #4,579 in 2015.
US births per 5-year period, 1990βpresent (SSA data).