Why are there so many 3 name assassins?

Lee Harvey Oswald

John Wilkes Booth

Failed Attempts:

Thomas Matthew Crooks

Richard Paul Pavlick - (failed jfk assassination attempt)

Sara Jane Moore - (shoots at Ford but misses)

Oscar Ramiro Ortega-Hernandez - (2011 shots fired at White House)

Raymond Lee Harvey - (Carter. He was a distraction with blank rounds, while the other conspirators didn’t follow through. What are the odds his his name has “Lee Harvey” in it..)

Ronald Gene Barbour (plotted to kill Clinton. Was arrested)

Francisco Martin Duran - (fired 24 shots at White House from the lawn. Clinton was inside WH)

Frank Eugene Corder - (stole at Cessna on September 11, 1994 and crashed it on White House lawn)