Combination of Ireland and the suffix -lyn
Irelyn is a modern American invention, likely created by blending the name of the country Ireland with the popular feminine suffix -lyn. It reflects a trend of using place names or heritage-inspired roots to create new, melodic names. While it lacks a deep historical etymology, it is often chosen to honor Irish ancestry in a contemporary way.
Less common today
Irelyn isn't in the latest US Top 1000. It last peaked at #1,373 in 2008.
US births per 5-year period, 1990βpresent (SSA data).