Namesakes
Fictional Characters from Song Titles:
1 character
(character) Casey Jones (middle name Luther) 1902; 1970 The Ballad of Casey Jones; Casey Jones 
Grammy Award Winners:
1 song of the year
(song of the year) Luther Vandross 2004 Dance with My Father
Nobel Prize Winners:
1 peace
(peace) Martin Luther King Jr. 1964
Notable Activists and Revolutionaries:
1 activist
(activist) Martin Luther King Jr. 1929-1968
Notable Actors and Entertainers:
1 actor, 1 actor/dancer
Bill "Bojangles" Robinson (a.k.a. Luther) 1878-1949
Luke Perry (middle name Luther) 1966-2019
Notable Musicians:
1 singer
Luther Vandross 1951-2005
Notable Politicians and Statespeople:
1 diplomat/politician
Colin Powell (middle name Luther) 1937-2021
Olympic Medalists:
1 bronze, 1 gold, 1 silver
(silver) Clyde Scott (middle name Luther) 1948 110 m hurdles
(gold) Dan Pippin (middle name Luther) 1952 basketball
(bronze) David Roberts (middle name Luther) 1976 pole vault