Harvester and grace
A compound name blending Terri, a diminutive of Theresa meaning 'to harvest,' with Ann, derived from the Hebrew Hannah meaning 'grace.' It emerged as a mid-20th-century American coinage, combining a familiar nickname with a classic suffix.
Less common today
Terriann isn't in the latest US Top 1000. It last peaked at #9,958 in 1997.
US births per 5-year period, 1990βpresent (SSA data).