Frère León (English: Brother León, Spanish: Hermano León; December 31, 1871 – November 20, 1955) was a French-born Cuban botanist and De La Salle Brother.
Born Joseph Sylvestre Sauget in Arbois, Jura, León was an important contributor to the botanical exploration of Cuba and co-authored, with Frère Alain, the five-volume Flora of Cuba which remains the standard reference on the topic.