Geoffroy de Navacelle de Coubertin succeeded him and headed the IPCC for more than 12 years .
Geoffroy de Navacelle de Coubertin is a great - nephew of Pierre de Coubertin .
Geoffroy de Navacelle de Coubertin , a great - nephew of Pierre de Coubertin , succeeded him and headed the IPCC for more than 12 years .