Ronell Renett Klopper (1974-) was born in Randfontein, South Africa. She is a chief plant taxonomist at the National Herbarium of the South African National Biodiversity Institute (SANBI). She and Gideon Smith raised Aloidendron to species level in 2013.
In 2016, Klopper and Gildenhuys published A synoptic review and new infrageneric classification for the genus Haworthiopsis (Xanthorrhoeaceae: Asphodeloideae) in Phytotaxa. They adopted 6 sections formerly recognized under Haworthia subg. Hexangulares to Haworthiopsis.