Modern invented name, possibly meaning beautiful lake
Jeylin is a modern American coinage, likely created by blending the popular prefix 'Jay' or 'Jey' with the suffix 'lin'. While it lacks a deep historical etymology, it is often associated with the name Jaylyn, which combines the bird name Jay with the Welsh element 'lyn' meaning lake.
Less common today
Jeylin isn't in the latest US Top 1000. It last peaked at #5,365 in 2009.
US births per 5-year period, 1990βpresent (SSA data).