Cajetan and Kajetan is the Anglicized, Germanized and Slavicized form of the Italian given name Gaetano. People with this name include:

• Thomas Cajetan (1469–1534), Italian Dominican theologian, cardinal, and opponent of Martin Luther
• Saint Cajetan (Gaetano dei Conti di Thiene; 1480–1547), canonized saint
• Constantino Cajetan (1560–1650), Italian Benedictine scholar
• Cajetan Tschink (1763–1813), Austrian writer and philosopher
• Baron Cajetan von Felder (1814–1894), Austrian lawyer, entomologist and liberal politician
• Karl Kajetan von Gaisruck (1769–1846), Austrian archbishop
• Kajetan Garbiński (1796–1847), Polish mathematician
• Josef Kajetán Tyl (1808–1856), Czech dramatist and author of lyrics of the Czech anthem
• Cajetan, pseudonym of the Austrian physician and illustrator Anton Elfinger (1821–1864)
• Kajetan von Mérey (1861–1931), Austro-Hungarian diplomat
• Kajetan Stefanowicz (1886–1920), Polish Art-Nouveau painter and illustrator
• Kajetan Mühlmann (1898–1958), Austrian art historian and officer in the SS
• Cajetan J. B. Baumann (1899–1969), Franciscan architect
• Kajetan Kovič (1931–2014), Slovene poet, writer, translator, and journalist
• Kajetan Duszyński (born 1995), Polish sprinter

• Caetani (surname)