Otto II (1065-after 1131), Count of Chiny, son of Arnold I, Count of Chiny, and Adélaïs.
He succeeded his father in 1106 and completed the construction of the Abbey of Orval that his father had started in 1070, installing the canons in 1124. The installation of a Cistercian community in Orval in 1131 marked his last appearance in any proceedings.
He married Adelaide (Alix) (1068-1124), daughter of Albert III, Count of Namur and Ida of Saxony (widow of Frederick of Lower Lorraine), who gave birth to:
Ida (also known as Ida of Namur) and Godfrey (also known as Godfrey the Bearded, not to be confused with his the uncle of his father Henry II, Godfrey) were parents of Adeliza of Louvain, wife of Henry I, King of England. Oda’s husband Gislebert was son of Otto, Count of Duras and therefore the grandson of Giselbert, the first Count of Looz, whose family would eventually be merged with the Counts of Chiny with the marriage of Otto's great-great granddaughter Jeanne, Countess of Chiny, with Arnold IV, Count of Looz.
After his death, Otto was succeeded as Count of Chiny by his son Albert.