I am not sure which of the many Teresas you are referring to but there were many, many female saints long before any of them were canonized.
St. Teresa Redi is a saint but not a patron saint.
St. Teresa of Jesus also known as St. Teresa of Avila was born in Spain.
Mother Teresa's patron saint was St. Therese of Lisieux.
St. Teresa of Avila was declared a Doctor of the Church in 1970.
St. Ignacious of Loyola
There are a number of saints named Teresa. Please be specific.
Yes, Saint Teresa and Saint Thérèse of Lisieux are different saints. Saint Teresa typically refers to Saint Teresa of Avila, a Spanish mystic and Doctor of the Church, while Saint Thérèse of Lisieux, also known as "The Little Flower," is a French Carmelite nun and Doctor of the Church. Both are highly regarded for their spiritual writings and devotion to God.
According to the Patron Saint Index the patron saints for vocations are St. Alphonsus Maria de Liguori and the Infant Jesus of Prague. There is no St. Teresa among them.
I have placed a link below of the biography of Teresa of Avila.
St. Teresa of Avila was made a saint in 1622, and a Doctor in 1970.
St. Teresa of Avila
Mother Teresa's patron saint was St. Therese of Lisieux.