Brandts Buys or Brandts Buijs is the surname of a dynasty of Dutch musicians:
Cornelis Buys (1757 1831), father of Cornelis AlijanderCornelis Alijander Brandts Buys (1812 1890), father of Marius, Ludwig and HenriMarius Adrianus Brandts Buys (1840 1911), father of Marius Adrianus and Jan belowLudwig Felix (Willem Cornelis) Brandts Buys (1847 1917), father of Johann SebastianHenri (François Robert) Brandts Buys (1850 1905),Johann Sebastian (1879 1939),Jan Willem Frans Brandts Buys (1868 1933),Marius Adrianus Brandts Buys (1874 1944), father of HansHans or Johann Sebastian Brandts Buys (1905 1959)Anna Brandts Buys-van Zijp, sculptor and co-author with Johann Sebastian (1879 1939) of a monograph on music in Madura