So is Christ, and therefore Christine and Christopher. Or Rex. Or Duke… Or Earl… Or Lady… Or Baron.
Bishop.
Pope.
Smith.
I’m sure there are more.
Earl is a real name. However, for this one, they explain in the series that he was supposed to be named Carl like his father, but due to sloppy handwriting he ended up being named Earl
“Major Major had been born too late and too mediocre. Some men are born mediocre, some men achieve mediocrity, and some men have mediocrity thrust upon them. With Major Major it had been all three. Even among men lacking all distinction he inevitably stood out as a man lacking more distinction than all the rest, and people who met him were always impressed by how unimpressive he was.”