* Adolf Hitler: He was named Person of the Year in 1938 and 1939.
* Ayatollah Ruhollah Khomeini: He was named Person of the Year in 1979 and 1980.
* The Computer: The Computer was named Person of the Year in 1982 and 2006. While this is a technology and not a person, Time Magazine recognized the impact of computers on society.
Therefore, there are three individuals or entities who were named Time Magazine Person of the Year twice, depending on how you interpret the "Computer" selection.