Bernard Kantor, also known Bernard Kantore, also known as Bernard J Kenton was ghost-writer and a friend of Jerry Siegel, who contributed on some of his original Superman stories.
Letter as a proof that Bernard Kantor/Kantore/Kenton is indeed a real person.
Bernard Kantore's grave
Trivia[]
There is speculation that famous Bottle-City Kandor was named after Jerry Siegel's friend. Although Kandor first appeared in a Otto Binder story, they both frequently collaborated on the plots back in the 1960's with Binder himself sometimes attributing Siegel.