Combination of Taylor and Lynn
Tailynn is a modern American invention, likely created by blending the occupational surname Taylor with the popular suffix Lynn. Taylor derives from the Old French 'tailleur' (cutter of cloth), while Lynn comes from the Welsh 'llyn' (lake).
Less common today
Tailynn isn't in the latest US Top 1000. It last peaked at #2,621 in 2013.
US births per 5-year period, 1990βpresent (SSA data).