John I (Jean) (d. 1278 or 1279), Count of Looz and Count of Chiny, eldest son of Arnold IV, Count of Looz and Chiny, and Jeanne, Countess of Chiny. He succeeded his father in 1272 or 1273, as the Count of Looz and Chiny. Virtually nothing is known about his reign.
He first married, in 1258, Matilda, daughter of William IV, Count of Jülich, and Matilda of Gelderland. Their children were:
Widowed, he married secondly, in 1269, Isabelle de Conde (d. after 1280), daughter of Jacques, Seigneur of Conde and Bailleul, and his wife Agnes of Rœulx. Their children were:
Upon his death, he was succeeded as Count of Chiny by his brother Louis, and as Count of Looz by his son Arnold.
Settipani, Christian, La Préhistoire des Capétiens (Nouvelle histoire généalogique de l'auguste maison de France, vol. 1), Villeneuve d'Ascq, éd. Patrick van Kerrebrouck, 1993, 545 p.
Thonissen, JJ., Arnold IV, Royal Academy of Belgium, National Biography, Vol. 1, Brussels, 1866
Arlette Laret-Kayser, Entre Bar et Luxembourg : Le Comté de Chiny des Origines à 1300, Bruxelles (éditions du Crédit Communal, Collection Histoire, série in-8°, n° 72), 1986