But since then only one, Adrian VI in the 16th Century, has kept his baptismal name.

CNN: What's in a name? Clues to be found in next pope's moniker

Some say that it would be a welcome change for popes to be called by their baptismal name.

FORBES: How Does The Pope Choose His Pope Name?

The last pope to use his baptismal name was Marcellus II in 1555.

FORBES: How Does The Pope Choose His Pope Name?