Bernard I
Bernard I may refer to:
- Bernard of Septimania, also known as Bernard I of Toulouse
- Bernard I of Poitiers
- Bernard I of Armagnac, called 'the Suspicious', first duke of Armagnac
- Bernard I William of Gascony
- Bernard I, Duke of Saxony
- Bernard I of Bigorre,
- Bernard I of Berga, count of Berga in 1035–1050
- Bernard II Tumapaler of Gascony, sometimes counted as Bernard I
- Bernard I de Balliol
- Bernard I, Margrave of Baden-Baden
- Bernard I, Duke of Brunswick-Lüneburg
- Bernardo I of Kongo