Florian Stanisław Ceynowa (Kashubian Florión Cenôwa) (May 4, 1817 – March 26, 1881) was a doctor, political activist, writer, and linguist.

He and Alexander Hilferding were not the only ones to study the language and legends of the Kashubians, but they had the greatest influence and prompted others to take up investigations.

He awakened Kashubian self-identity, thereby opposing Germanisation and Prussian authority, and Polish nobility and clergy.

He strove to create a program aimed at the introduction of a Kashubian standard in grammar, pronunciation and spelling, based on the spirit of the 1848 Revolution.

He was part of an attempt to take the Prussian garrison in Preußisch Stargard (Starogard Gdański) during 1846, but the operation failed when his 100 combatants, armed only with scythes, decided to abandon the site before the attack was carried out.