As the family had internal squabbles over headship rights after his elder brother Tadatsune FUJII-MATSUDAIRA died at the early age, the adopted child from the branch family, Tadasato FUJII-MATSUDAIRA, succeeded to his father Tadamasa.
長兄・藤井松平忠英が夭逝した後の嫡子をめぐり、御家騒動となったため、父・忠済の後は分家からの養子・藤井松平忠学が継いだ。