The Genealogiæ Scriptoris Fusniacensis names "Ottonem comitem et sorores eius" as children of "Arnulfus comes de Cinni" and his wife Adela. "Arnulfus…comes" founded the priory of Sainte-Valpurge at Chiny, confirmed by "filiorum meorum Ottonis et Ludovici, nurus…meæ Adeleid", by charter dated 1097, later confirmed by "Ottonis comitis et Frederici præpositi Remensis et Alberti comitis filiorum eius et Adadis comitissæ et Guillelmi avocati".
Comte de Chiny. A charter dated 30 Sep 1124 notifies the consecration of the church of Orval, in the presence of “Otto comes de Cisney cum sua uxore Adelada et filiis suis...Frederico Remensis ecclesiæ præposito et Alberto post patrem comite”, noting that the count confirmed the actions of “pater suus Arnulphus...jussu Mathildis marchionissæ”. The Chronicon Sancti Huberti names "filius eius [=Arnulfus comes Chisniacensis] Otto" when recording that he died with "Henrico Coloniæ". 1
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