No one we know of by name invented the razor.
Razors of different types have been around for ages: flint, shells, and hammered metal all have been used.
Soldiers of ancient Rome shaved for battle so their enemies couldn’t grab on to their beards.
The ancient Greeks shaved daily, they liked their faces clean of growth.
The Founding Fathers of the United States lived in a time when it was fashionable to pluck each hair individually with clamshell tweezers, although straight-edge razors were available, they’d been around for nearly as long as swords.
The modern razor had its start with the French, who invented the “safety” razor, which prevented serious injury when shaving.
In the 1880s, North America saw the T-shaped razor for the first time.
King Gillette, which was his real name, not a title, gave the world the disposable razor blade in 1895.