His sister, Maria Ratzinger, never married and cared for the household of then Cardinal Ratzinger until her death in 1991.
Pope Benedict XVI
No, there has never been a twin Pope Benedict. However, Saint Benedict had a twin sister named Scholastica.
His sister Maria passed away in 1991.
His Holiness Pope Emeritus Benedict XVI
Pope Benedict XVI canonized Mary on October 17, 2010.
Pope Benedict XVI now known as Pope emeritus (Pope retired) has a brother, George, who is a priest. He also had a sister, Maria, who passed away several years ago.
Pope Benedict was able to choose a new name when he was elected Pope. Popes usually choose the name of a saint they admire.
Maria Ratzinger died in 1991.
Mary was canonized on October 17, 2010, by Pope Benedict XVI in Rome.
Pope Benedict was never married. Popes do not marry, nor do priests or bishops.
This question needs more details. There are sixteen Popes called Benedict (the current Pope is Pope Benedict XVI) and thirteen Popes named Innocent.
He had a mother, a father, a sister and a brother.