Who Was Mother Teresa?By: Jim Gigliotti, Who HQ Illustrator: David Groff Series: Who Was? Born a humble girl in what is now Albania, Agnes Bojaxhiu lived a charitable life. She pledged herself to a religious order at the age of 18 and chose the name Sister Teresa, after the patron saint of missionaries. While teaching in India, where famine and violence had devastated the poor, Teresa shed her habit and walked the streets of Calcutta tending to the needs of the destitute.