Teresa, Theresa and Therese (French: Thérèse) are feminine given names. The name may be derived from the Greek verb θερίζω (therízō), meaning to harvest.
Its popularity likely increased because of the prominence of several Roman Catholic saints, including Teresa of Ávila, Thérèse of Lisieux and, most recently, Mother Teresa.
The popularity of this name in the United States over the last 15 years is falling, according to the US Census. Spelled “Theresa,” it was ranked as the 852nd most popular name for girls born in 2008, down from 226th in 1992 (it ranked 65th in 1950, and 102nd in 1900). Spelled “Teresa,” it was the 580th most popular name for girls born in 2008, down from 206th in 1992 (it ranked 81st in 1950, and 220th in 1900).