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From Rodovid EN

Lineage	Hamengku Buwono VI
Sex	Male
Full name (at birth)	Raden Triyadi Nugroho [Hb.6.18.6.2.1.3]
Parents ♂ Raden Mas Sutariyo [Hb.6.18.6.2.1] [Hamengku Buwono VI]

From grandparents to grandchildren