Members of the the Society of Jesus are known as Jesuits
Society of Jesus is a Christian religious order of the Roman Catholic Church at the service of the universal Church.
Among many other contributions, the Jesuits so dominated the study of earthquakes that seismology became known as "the Jesuit science", according to Thomas E. Woods, Jr., PhD, in his book How The Catholic Church Built Western Civilization.
The Jesuits were a religious order created to serve the pope and the church. It was founded in 1534 by a Spanish noble, Ignatius of Loyola. One of the Jesuits' goals was to teach people about Catholic ideas. They hoped that a strong Catholic education would turn people against Protestant ideas.
Catholic AnswerThe Jesuits, as originally founded by St. Ignatius of Loyola and approved by Pope Paul III in 1540 had a two fold aim: 1) to strengthen and where necessary to restore the Catholic faith in the wake of the protestant revolt, and 2) to preach the Gospel in non-Christian lands. from Modern Catholic Dictionary by John A. Hardon, S.J. Doubleday & Co., Inc. Garden City, NY 1980
They are simliar to friars, as they are not monks, but a religious Order as opposed to a monastery. They take the normal three vows of poverty, chastity, and obedience, along with a fourth vow of absolute obedience to the Holy Father. They have been famous for their education, it takes a minumum of nine years to become a Jesuit.