Rhinoceros sondaicus was the scientific name used by Anselme Gaëtan Desmarest in 1822 for a rhinoceros from Java sent by Pierre-Médard Diard and Alfred Duvaucel to the National Museum of Natural History, France.In the 19th century, several zoological specimens of hornless rhinoceros were described:
Rhinoceros inermis proposed by René Lesson in 1838 was a female rhinoceros without horns shot in the Sundarbans.
Rhinoceros inermis proposed by René Lesson in 1838 was a female rhinoceros without horns shot in the Sundarbans.
- Rhinoceros nasalis and Rhinoceros floweri proposed by John Edward Gray in 1867 were two rhinoceros skulls from Borneo and one from Sumatra, respectively.
- Rhinoceros annamiticus proposed by Pierre Marie Heude in 1892 was a specimen from Vietnam.
As of 2005, three Javan rhinoceros subspecies are considered - R. s. sondaicus, the nominate subspecies, known as the Indonesian Javan rhinoceros
- R. s. inermis, known as the Indian Javan rhinoceros or lesser Indian rhinoceros
- R. s. annamiticus, known as the Vietnamese Javan rhinoceros or Vietnamese rhinoceros
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