Modern invented name, likely a blend of Jay and Lynn
Jlyn is a contemporary American coinage, typically created by combining the phonetic 'J' (often associated with the name Jay or the bird) with the popular suffix 'lyn'. As an invented name, it does not have a singular ancient etymology but follows the 21st-century trend of creative spelling and name blending.
Less common today
Jlyn isn't in the latest US Top 1000. It last peaked at #5,362 in 2006.
US births per 5-year period, 1990βpresent (SSA data).