Michael Craig Ruppert (February 3, 1951 – April 13, 2014) was an American writer and musician, Los Angeles Police Department officer, investigative journalist, political activist, and peak oil awareness advocate known for his 2004 book Crossing The Rubicon: The Decline of the American Empire at the End of the Age of Oil.

Jacob Ruppert Jr. (August 5, 1867 – January 13, 1939) was an American brewer, businessman, National Guard colonel and politician who served for four terms representing New York in the United States House of Representatives from 1899 to 1907.

Friedrich (February 2, 1905 – May 28, 1946) an SS-TV (paramilitary rank equivalent to lieutenant colonel) in charge of executions at Dachau concentration camp; he was, along with others, responsible for the executions of captured British SOE agents Noor Inayat Khan, Madeleine Damerment, Eliane Plewman, and Yolande Beekman.