József Gyula Hubertus Szent-Ivány AM (3 November 1910 – 8 June 1988) was a Hungarian entomologist who specialized in the Lepidoptera.
He used the name Gyula Hubertus since his father József Szent-Ivány (1894–1941) came from a noble land-owning class and was a political leader in Czechoslovakia.
He moved to western Europe when the Russians invaded Hungary and in the summer of 1950 he decided to emigrate to Australia.
He set up a research station in Konedoba in eastern Papua New Guinea in 1954 and worked on rearing and protection of birdwing butterflies, especially Ornithoptera meridionalis which was valuable among collectors.
Despite moving to Australia, he was a proud Hungarian and his ex-libris included a portrait of Lajos Bíró.