Because Takako TAKATSUKASA, the daughter of Nobufusa, became a legitimate wife of Iemitsu TOKUGAWA, her younger brother Nobuhira TAKATSUKASA was allowed to refer to himself as being of the Takatsukasa-Matsudaira Family, and he changed his social status from a court noble who served the Emperor to a hatamoto (a direct vassal of the shogun) of the Tokugawa family; the Takatsukasa Family, a samurai family, had been promoted over generations and ultimately became the house of the lord of the domain of Yoshii, in Kozuke Province.
また、信房の娘の鷹司孝子が徳川家光の正室となったことから、弟である鷹司信平は、鷹司松平家を名乗ることが許され、天皇に仕える公家から、徳川家の旗本へと転身した、この武家の鷹司家は、代を重ねるごとに加増され、最終的には上野国吉井藩主家となった。