Heather field or field of heather
Hadli is a modern phonetic spelling of the English surname Hadley. It originates from Old English words 'hæth' (heather) and 'leah' (wood, clearing, or meadow), describing someone who lived near a heather-covered field.
Less common today
Hadli isn't in the latest US Top 1000. It last peaked at #6,215 in 2015.
US births per 5-year period, 1990βpresent (SSA data).