Modern invented name, likely meaning field or meadow.
Tynleigh is a contemporary American invention, likely created by combining the 'Tyn-' sound from names like Tinsley or Tyndall with the popular '-leigh' suffix. The suffix is derived from the Old English 'leah', meaning a meadow or clearing, giving the name a connection to nature.
Less common today
Tynleigh isn't in the latest US Top 1000. It last peaked at #6,438 in 2015.
US births per 5-year period, 1990βpresent (SSA data).