The Bosonids were a dynasty of Carolingian era dukes, counts, bishops and knights descended from Boso the Elder. Eventually they married into the Carolingian dynasty and produced kings and an emperor of the Frankish Empire.

The first great scion of the dynasty was Boso V, Count of Arles and of other Burgundian counties in the mid-9th century. Boso rose in favour as a courtier of Charles the Bald. He was even appointed viceroy in Italy in 875. After the death of Charles' son Louis II, Boso refused to recognise Louis' sons Carloman and Louis III as kings of France, and proclaimed himself King of Provence in 879 at Vienne, with the support of the nobility. Boso strove throughout the rest of his life to maintain his title in the face of the Emperor Charles III. He died in 887 and was succeeded by his son Louis under the regency of his wife Ermengard, a daughter of the Emperor Louis II.

Louis was adopted by Charles III and legitimised in his royal title. With this legal basis, he sought to take the place of his Carolingian relatives on the imperial and Italian thrones in 900. He was crowned in Pavia and then in Rome, but could not actually hold on to power there.

• Boso the Elder
  • daughter, possibly named Richildis, married to Bivin of Gorze; for offspring see his branch
  • Boso, count in Italy
  • Teutberga, married to Lothar II king of Lotharingia
  • Hucbert, lay abbot of St-Maurice-in-Valais
    • Theobald of Arles, married to Bertha, daughter of Lothar II and Waldrada
      • Hugh of Arles, king of Italy
        • Lothair, king of Italy
        • Hubert, Duke of Spoleto (illegitimate)
          • Hugh, Margrave of Tuscany
        • Bertha (Eudokia), married Romanos II Roman Emperor of Macedonian dynasty
      • Boso, Margrave of Tuscany
        • Bertha or Gersenda, married firstly Boso of Burgundy (of Bivin's branch of Bosonids, below), and secondly Raymond II of Rouergue
        • Willa, married Berengar II of Italy
        • Rotbold/Rotbald (+950)
          • Boso II of Provence, married Constantia, daughter of Carolus Constantinus
            • Rotbold I, Count of Provence
              • Rotbold II, Count of Provence
                • William III of Provence
            • William I, Count of Provence
              • Constance of Arles, married Robert II of France
              • William II of Provence
                • William IV of Provence
                • Fulk Bertrand of Provence
                  • William Bertrand of Provence
                  • Geoffrey II of Provence
                • Geoffrey I of Provence
                  • Bertrand II of Provence
                  • Gerberga, Countess of Provence
                    • Douce I, Countess of Provence

• Richard, count of Amiens
  • Richard
  • Bivin of Gorze, married to a daughter of Boso the Elder, possibly named Richildis
    • Richard the Justiciar, Duke of Burgundy, first married to Adelaida of Auxerre
      • Rudolf, Duke Burgundy, King of France, married Emma of Paris
        • Louis
        • Judith
      • Hugh the Black, Duke of Burgundy
      • Boso, count, married Bertha, daughter of Boso, Margrave of Tuscany (of Boso the Elder's branch of Bosonids)
      • Gibuin, count of Dijon; from a second marriage
        • Hugo, count of Dijon
          • Richard, count of Dijon
          • Hugo, count
          • Gibuin, bishop of Chalon
          • Odo
    • Richildis, married to Charles the Bald
    • ? possibly Bivin, count of Metz?
    • Boso, count of Vienne, king of the Provence, married secondly to Ermengard, daughter of Louis II
      • Louis the Blind; married Anna, daughter of Leo VI Roman Emperor of Macedonian dynasty
        • Carolus Constantinus, count of Vienne, married Theoberga of Sens
          • Hugobert
          • Richard
          • (perhaps) Constantia, married Boso II of Provence, son of Rotbold (+950)
      • Engelberga, married to William the Pious, duke of Aquitaine

• Constance B. Bouchard, "The Bosonids or Rising to Power in the Late Carolingian Age" French Historical Studies 15.3 (Spring 1988), pp. 407–431.

• Pierre Riché, The Carolingians, a family who forged Europe.