How did Richard J. Gatling make the Gatling gun

The Minigun is Gatling gun where the barrels are powered by an electric motor.

The Gatling gun, was a hand cranked, multi-barreled gun.

The inventor of the Gatling gun was Richard Jordan Gatling. The machine gun- like weapon was named after the inventor. He invented it in 1862.

No.

"The idea of the machine gun was conceived by Richard Jordan Gatling in 1861, and was first constructed and fired by the inventor at Indianapolis in 1862. In 1865 he had twelve of his guns made by the Cooper Fire Arms Manufacturing Company in Philadelphia."

The Gatling Gun followed a long tradition of devices named after the person who invented / designed it.