Optimus Prime: the human and the Transformer
top: Optimus Prime the human; bottom left: Optimus Prime in robot mode; bottom right: Optimus Prime in truck mode

In 2001, this U.S. Army Ohio National Guard firefighter changed his name to Optimus Prime, one of the characters in The Transformers, an animated series and toy line that was popular in the U.S. from 1984 to 1990.