A common question about Elbert Hubbard is if he is related to L. Ron Hubbard of Scientology. (Scientology's members include famous Hollywood actors such as John Travolta and Tom Cruise.)
L. Ron Hubbard was a nephew of Elbert by the adoption of his father into the Hubbard family. L. Ron's father, Harry Ross Hubbard, was born Henry August Wilson but was adopted as an orphan by a Mr. and Mrs. James Hubbard of Iowa. Elbert, therefore, was an uncle (but not by blood).
L. Ron Hubbard was so impressed with his uncle Elbert Hubbard's accomplishments that in 1956 he dedicated the ninth printing of Dianetics: The Modern Science of Mental Health to him.
L. Ron Hubbard was born in 1911. Elbert Hubbard died in 1915. It is unknown but doubtful they ever met.