"Odonis comitis filii Theobaldi comitis" subscribed the charter dated 950 under which Ragnfred Bishop of Chartres donated property to Chartres Saint-Père. Rodulfus Glaber names "Odo…filius Tetbaldi Carnotensis cognomento fallacis", recording that he was "chief among the rebels…who rebelled against the king [Robert I] from positions that should have made them humble". Rodulfus Glauber names "Odonem" son of "Tetbaldus [et] sororem [Heribertum Trecorum comitem]". Ademar names "Odonis Campanensis" as brother of "Emma", mother of Guillaume Duke of Aquitaine. Odalric Archbishop of Reims granted him Coucy after recovering it from Eudes's father.
He succeeded his father as EUDES I Comte de Blois, de Chartres, de Châteaudun, de Tours, de Beauvais et de Dreux. "Odo comes…" signed a charter dated Feb 977 of Chartres Saint-Père. "Odoni comitis…" signed a charter dated Oct 977 relating to Bourgeuil. "Ledgardis" donated property to "Sancti Petri Carnotensis ecclesiam", for the souls of "senioris mei…comitis Tedbaldi…patris mei Heirberti, Trecassini comitis", with the consent of "archipresule…Hugone et…comite Odone, filiis meis", by charter dated 5 Feb 978, signed by "…Emma comitissa Pictavæ urbis…".
Seigneur de Chinon et de Saumur. A letter of Gerbert dated 983 records that "Heriberti Trecassini et Oddonis comitis filii Tedbaldi" were enemies of "Adelbero Remonis archiepiscopus", while a letter dated to mid-985 records that "Ottonem, Heribertum" made peace with the archbishop. “Odo comes” restored “villam...Culturas” to Marmoutier, for the souls of “...domini Hugonis archiepiscopi, cujus ibi corpus...jacet”, by charter dated to , subscribed by “Berte comitissæ uxoris eius, majoris filii eius Teutboldi, filii eius Odonis adhuc in cunabulo”. A letter of Gerbert dated to [late 986/early 987] records that "O et Heribertus comites" were part of the council of Emma Queen of France. It is assumed that "Oddonis/Ottonem/O" all refer to the same person. "Robert Vicomte de Blois" donated property to the abbey of Evron by charter dated 989 subscribed by "Odonis comitis, Rotberti filii eius, Tetbaldi filius eius, Odonis alterius filius, Hugonis vicecomitis Castridunensis, Raherii de Montigniaco".
Rodolfus Glaber records his place of burial when stating that his son Eudes II was buried next to his father. 1