Meaning and history
Theresia is a German, Dutch, Scandinavian, and Late Latin form of Teresa. The Greek origin of Teresa is uncertain; proposals connect it with the island of Thera, “summer,” or a verb meaning “to harvest,” but none is definitive. Saint Teresa of Ávila and Saint Thérèse of Lisieux gave the name major Catholic significance. Notable bearers include Austrian politician Theresia Haidlmayr and German scientist Theresia Degener, a legal scholar and disability-rights advocate.
19881988: no US SSA record for this spelling
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19931993: no US SSA record for this spelling
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19981998: no US SSA record for this spelling
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20032003: no US SSA record for this spelling
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20072007: 7 births, rank #13,924
Theresia rose from #912 to #834 for girls between 1901 and 1904. Its highest annual birth count came in 1888, with 22 births.