Hedge or hay meadow
A modern American invention likely combining the surname-origin 'Hayes' with the popular suffix 'lee'. It evokes imagery of open fields and natural landscapes, following the trend of surname-style names for girls.
Less common today
Hayslee isn't in the latest US Top 1000. It last peaked at #5,457 in 2015.
US births per 5-year period, 1990βpresent (SSA data).