Heathland or untillable land
Heith is a rare variant of the English surname Heath. It refers to a person who lived on or near a heath, which is an area of open, uncultivated land characterized by low-growing shrubs.
Less common today
Heith isn't in the latest US Top 1000. It last peaked at #5,148 in 1990.
US births per 5-year period, 1990βpresent (SSA data).