Heroine or meadow of hay
Haleigha is a modern American elaboration of the name Hayley or Hallie. It likely combines the Old English elements 'heg' (hay) and 'leah' (clearing/meadow), or stems from the Scandinavian name Hallie meaning 'heroine'. The 'a' suffix is a contemporary stylistic addition to create a more melodic, feminine sound.
Less common today
Haleigha isn't in the latest US Top 1000. It last peaked at #10,291 in 2011.
US births per 5-year period, 1990βpresent (SSA data).