Peter Dajnko (23 April 1787 – 22 February 1873) was a Slovene priest, author, and linguist, known primarily as the inventor of the Dajnko alphabet (Slovene: dajncica), an innovative proposal for the Slovene alphabet.
Dajnko was also a proficient beekeeper and wrote the first book about beekeeping in the Slovene language, titled Celarstvo (meaning "Beekeeping" in English).