Likely a modern blend of Maitland and Lynn
Maitlyn is a contemporary American invention, most likely created by combining the surname Maitland (meaning meadow land) with the popular suffix -lyn. It follows the trend of creating unique, feminine variations of established surnames or classic sounds. As a modern coinage, it lacks a singular ancient etymology but carries a rhythmic, soft appeal.
Less common today
Maitlyn isn't in the latest US Top 1000. It last peaked at #8,819 in 2008.
US births per 5-year period, 1990βpresent (SSA data).