Roy Rockwood was a house pseudonym used by the Stratemeyer Syndicate for boy's adventure books. The name is most well-remembered for the Bomba the Jungle Boy and Great Marvel series.
In addition to Garis and Duffield, some of these books were also written by Leslie McFarlane and W. Bert Foster.
Edward Stratemeyer had earlier used the pseudonym "Roy Rockwood" for the book The Wizard of the Sea; or a Trip Under the Ocean, published by the Mershon Company in 1900.