Ursini may refer to:
Ursini (surname) Ursini (Araneidae), a spider tribe in the subfamily Araneinae comprising only the genus Ursa Ursinae, in some systems a bear tribe comprising the genus Ursus sensu lato (i. e. the genera Ursus sensu stricto, Protarctos, Helarctos, and Melursus), corresponding to the subfamily Ursinae in some other systems a section in the subgenus Rubus of the genus Rubus taxonomy a small bipedal alien species in the Mythology of Stargate Ursini, a prefix claimed by the Croatian noble family Blagajski, a cadet branch of the Babonić family
See also Orsini (disambiguation)