Combination of Jessie and Lynn
Jezlyn is a modern American invention, likely created by blending the Hebrew name Jessie (meaning 'gift') with the Welsh/English suffix Lynn (meaning 'lake'). It follows the 21st-century trend of creating unique, rhythmic names by combining familiar phonetic elements.
Less common today
Jezlyn isn't in the latest US Top 1000. It last peaked at #7,698 in 2007.
US births per 5-year period, 1990βpresent (SSA data).