Bran Mak Morn is a hero of five pulp fiction short stories by Robert E. Howard. In the stories, most of which were first published in Weird Tales, Bran is the last king of Howard's romanticized version of the tribal race of Picts.
Robert Ervin Howard was an American pulp writer of fantasy, horror, historical adventure, boxing, western, and detective fiction. Howard wrote "over three-hundred stories and seven-hundred poems of raw power and unbridled emotion" and is especially noted for his memorable depictions of "a sombre universe of swashbuckling adventure and darkling horror."
He is well known for having created—in the pages of the legendary Depression-era pulp magazine Weird Tales—the character Conan the Cimmerian, a.k.a. Conan the Barbarian, a literary icon whose pop-culture imprint can only be compared to such icons as Tarzan of the Apes, Count Dracula, Sherlock Holmes, and James Bond.
—Wikipedia
Librarian Note: There is more than one author in the Goodreads database with this name.
This collection only has three stories in it, and of the three, only two ("Kings of the Night" and "Worms of the Earth") are properly Bran Mak Morn tales. The third story, "Children of the Night," mentions Bran, and is interesting because of Howard's mention of H. P. Lovecraft's Cthulhu mythos, but it's not one of Howard's best yarns.