Hedge meadow or Tynes meadow
Tinley is an English surname-turned-given-name derived from Old English. It likely refers to a meadow (leah) belonging to a person named Tynni, or a meadow enclosed by a hedge.
Less common today
Tinley isn't in the latest US Top 1000. It last peaked at #795 in 2016.
US births per 5-year period, 1990βpresent (SSA data).
A village in Illinois named after railroad agent Samuel Tinley