Pledge or eagle wood
Arlynn is a modern American coinage, likely a blend of the Irish name Arlene and the popular suffix -lynn. It may also be interpreted as a variant of Arlen, meaning 'pledge', or derived from Germanic roots meaning 'eagle wood'.
Less common today
Arlynn isn't in the latest US Top 1000. It last peaked at #5,172 in 2018.
US births per 5-year period, 1990βpresent (SSA data).