Liber is a village and municipality in Prague-West District in the Central Bohemian Region of the Czech Republic.

In ancient Roman religion and mythology, Liber ("the free one"; ), also known as Liber Pater ("the free Father") was a god of  viticulture and wine, fertility and freedom. He was a patron deity of Rome's plebeians and was part of their Aventine Triad. His festival of Liberalia (March 17) became associated with free speech and the rights attached to coming of age. His cult and functions were increasingly associated with Romanised forms of the Greek Dionysus/Bacchus, whose mythology he came to share.