A diplomatic agent of the pope with rank equal to that of an ambassador is a nuncio.
Other than that, you are probably thinking of a papal legate, who is an agent sent by the pope on a specific errand, with delegated administrative authority. (This must not be confused with an apostolic prefect or apostolic vicar, who is sent with special sacramental faculties to administrate and serve an evangelical mission.)
His Holiness Pope Julius II was called the "Warrior Pope".
The latest pope (March 2013) is called Pope Francis.
Pope Urban II called for the First Crusade.
Pope Urban II
pope in Hinduism is called poojari or shankaracharya. Shankaracharya is just a position like pope and not a name.
The pope's mother has no special title. She is simply called the pope's mother. Pope Benedict XVI's mother is named Maria Ratzinger.
The pope's chief of staff, called the Camerlengo
An Indian agent called an Indian agent
The First Crusade was called by Pope Urban II.
There is no pope of Spain, only the pope who resides in the Vatican who is the pope of ALL countries.
Pope Paul III called for the council.
The first pope to be officially called "pope" in the history of the Catholic Church was Pope Siricius, who served as the Bishop of Rome from 384 to 399 AD.