Admirable or lake
Shailynn is a modern American invention, likely created by blending the Irish-derived name Shea, meaning 'admirable' or 'stately', with the popular suffix -lynn, which refers to a lake. It represents a contemporary trend of phonetic name construction.
Less common today
Shailynn isn't in the latest US Top 1000. It last peaked at #5,042 in 2002.
US births per 5-year period, 1990βpresent (SSA data).