Valentinus

• Pope Valentine (died 827)
• Saint Valentine, 3rd century Christian saint
• Valentinus (Gnostic) (died c. 150), early Christian gnostic theologian
• Valentinus Paquay (1828–1905), Friar Minor
• Valentinus Smalcius (1572–1622), German Socinian theologian

• Valentinus (rebel), 4th-century Roman exile who attempted a conspiracy in Roman Britain
• Valentinus (usurper) (died 644), Byzantine general and usurper, father of empress Fausta

• Basilius Valentinus, 15th century monk from Erfurt who may have described bismuth
• Valentinus Lublinus (16th-century–16th-century), 16th-century Polish physician and editor
• Valentinus Otho (died 1603), German mathematician and astronomer
• Valentinus Nabodus (1523–1593), German mathematician, astronomer and astrologer

• Anacyclus valentinus, a species of aster
• Ischnocolus valentinus, a small, old-world tarantula
• Squalius valentinus, a species of freshwater fish in the carp family Cyprinidae

• Valentin, given name
• Valentina (given name), the feminine of Valentinus
• Valentine (disambiguation)
• Valentinian (disambiguation)
• Bálint, the Hungarian version

{{disambiguation|human name|given name}}