Carolus Magnus (Charlemagne), Holy Roman Emperor

Carolus Linnaeus (Carl von Linné), Swedish botanist and physician

Carolus Rex (Charles XII or Karl XII), King of Sweden

Carolus Gustavus (Charles X Gustav or Karl X Gustav), King of Sweden

Several Swedish ships of the line have also been named Carolus.

Carolus Clusius (Charles de l'Écluse), Flemish doctor and botanist

Carolus Sigonius (Carlo Sigonio or Sigone), Italian humanist

Carolus, the Latin form of Carl, may refer to:

Carolus-Duran (Charles Auguste Émile Durand), French painter

Carolus Linnaeus the Younger (Carl von Linné or Linnaeus filius), Swedish naturalist

Carolus (genus), a genus of six species in a family of flowering plants.

carolus (coin), was a gold coin struck in the reign of Charles I.

16951 Carolus Quartus, an asteroid named after Charles IV (Latin: Carolus Quartus), the Holy Roman Emperor and King of Bohemia.