written by his son Rock Brynner in 1989 clarified these issues. His father, Boris Julievich Bryner, was a mining engineer whose father, Jules Bryner, was Swiss and whose mother, Natalya Iosifevna Kurkutova, was a native of Irkutsk and was partly of Buryat Mongol ancestry. [5] His mother, Marousia Dimitrievna (née Blagovidova),