Theresa as a girl's name is of Greek origin meaning "late summer". The first bearers of this name might have been from the Greek island of Therasia. Saint Teresa of Avila was an astringent, intellectual mystic. Saint Therese of Lisieux, France (19th century), who died at age 24, wrote an account of her life published as "The Story of a Soul", which so affected its readers worldwide that she became the most popular saint of modern times.
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Source: Social Security Administration
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