- Mathilde COSYNS
Birth - 1867 - Machelen, Flandre Orientale, Flandre, BEL - Maria Helena "Hélène" PARQUI
- Charles Antoine COSYNS
Birth - 18 May 1867 - Wissous, Essonne, Île-de-France, FRA - Maria Adelina de SCHRYVER
- Pieter "Peter" COSYNS
- Maria Sylvia COSYNS
Birth - 18 November 1867 - Steenhuize-Wijnhuize, Flandre Orientale, Flandre, BEL - Charles Louis COSYNS
- Jean Baptiste COSYNS
Birth - 19 March 1868 - Mont-sur-Marchienne, Hainaut, Wallonie, BEL
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