Leoninus

Leoninus may refer to:
 * Léonin (fl. 1150s—? 1201), the first known significant composer of polyphonic organum
 * Elbertus Leoninus (1519 or 1520–1598), Dutch jurist and statesman who helped negotiate the Pacification of Ghent

Species Latin names

 * Charaxes leoninus, a butterfly species in the genus Charaxes
 * Pluteus leoninus, the lion shield, a mushroom found growing on dead wood in Europe and North Africa
 * Thalassius leoninus, a spider species in the genus Thalassius