Ludwig Lorenz von Liburnau (26 August 1856 in Fiume – 9 December 1943 in St. Gilgen) was an Austrian zoologist.
He was the son of naturalist Josef Roman Lorenz von Liburnau (1825–1911).
In 1899 he was the first scientist to provide analysis of Hadropithecus stenognathus (an extinct species of lemur), a study based on a mandible discovered by fossil collector Franz Sikora at Andrahomana cave in southeastern Madagascar.
At the time, Lorenz believed the specimen to be the mandible of an anthropoid primate species.
[1] The North Island kaka (Nestor meridionalis septentrionalis), a nationally endangered bird from New Zealand, was named by Lorenz in 1896.