B.R.M. Susaktyo He was the sixth child of Mangkunegara VIII (b. 1959) Parents RA Sunituti Mangkunegara VIII Children Siblings Mangkunegara IX B.R.Aj. Retno Satuti G.R.Ayu Retno Astrini GRAY Ratna Rosilawati Kadarisman B.R.Aj. Retno Rosati R.M. Herwasto K.P.A. Prabu Kusumo B.R.M. Kumiyakto