His biological father was Kinito TOKUDAIJI, Udaijin (Minister of the Right), and his older biological brother was Sanetsune TOKUDAIJI, who served as the Grand Chamberlain three times and as Minister of the Imperial Household.
実父は右大臣徳大寺公純、実兄は3度にわたって侍従長となり、内大臣もつとめた徳大寺実則。