Pearl of the lake or bitter lake
A modern American invention, Maislyn likely combines the vintage diminutive Maisie (from Margaret, meaning 'pearl') with the popular suffix -lyn (often associated with 'lake'). Alternatively, it may be seen as a variant of Madelyn, which stems from Magdalene, meaning 'of Magdala' or 'bitter'.
Less common today
Maislyn isn't in the latest US Top 1000. It last peaked at #7,895 in 2022.
US births per 5-year period, 1990βpresent (SSA data).