Pure or clear water
Kashlyn is a modern American invented name, likely created by blending the prefix 'Kash' with the popular suffix 'lyn'. While it lacks a singular ancient etymology, it is often associated with the meaning of 'pure' through its phonetic connection to Katherine or 'lake' through the Welsh-derived suffix 'lyn'.
Less common today
Kashlyn isn't in the latest US Top 1000. It last peaked at #4,519 in 2016.
US births per 5-year period, 1990βpresent (SSA data).