Prabowo's Ancestry: Both Diponegoro Ally and Dutch Colonial Collaborator

President Prabowo Subianto's family tree tells two stories of the Java War, and they contradict each other in ways that matter for understanding who he is and what he claimed to be.

In late July 2026, after Prabowo used the term "londo ireng"—colonial lackey—to describe journalists, observers, and civil society groups he viewed as serving foreign interests, social media users began digging into his ancestry. Within days, around 30 accounts on X were circulating a poster tracing Prabowo's lineage back to Raden Banyak Wide, a senior commander in Prince Diponegoro's forces during the Java War of 1825 to 1830. The narrative was clean: here was a president descended from a nationalist hero, a man whose ancestor had fought against Dutch colonial rule. The poster claimed this ancestry ran through Prabowo's grandfather Margono Djojohadikusumo, who founded Bank Negara Indonesia, and his father Sumitro Djojohadikusumo, an economist and cabinet minister under both Sukarno and Soeharto.

Tempo's fact-checking team confirmed the paternal connection. Raden Banyak Wide—formally Raden Adipati Ario Kertonegoro IV—was indeed Prabowo's ancestor through his father's line. Banyak Wide served as regent of Karanganyar in Central Java from 1805 to 1885 and commanded Diponegoro's forces in the Kedu region during the five-year conflict that killed an estimated 200,000 people and displaced millions. After the war ended, Banyak Wide mounted another rebellion against the Dutch and was exiled to Ternate with his family. When he returned to Java around 1850, he arranged his son's marriage, beginning a chain of descent that eventually led to Margono, then Sumitro, then Prabowo.

But the paternal line carried its own complications. Banyak Wide's in-law, Raden Adipati Ario Joyodiningrat, had initially fought alongside Diponegoro as a junior commander. Wounded late in the war, Joyodiningrat withdrew from combat. Then, as the conflict wound down in late 1829 or early 1830, he switched sides. He entered the pangreh praja—the indigenous civil service under Dutch East Indies rule—and served as a tax official before becoming Regent of Karanganyar. Banyak Wide's own descendants followed a similar path. His grandson Raden Mas Hendrokusumo worked as an assistant district head and deputy prosecutor under the Dutch administration. Hendrokusumo's son was Margono, the BNI founder. Military historian Petrik Matanasi noted that Prabowo's paternal ancestors were not entirely anti-colonial. "There were times when they resisted, and times when they served as regents under the Dutch," he said.

The maternal side tells a starker story. Prabowo's mother was Dora Marie Sigar, and her ancestry ran directly to Benjamin Thomas Sigar, a Minahasan chief who commanded auxiliary troops for the Dutch during the Java War. The colonial government had contracted with Minahasan district chiefs to supply soldiers. In an agreement signed December 23, 1827, these chiefs pledged to send 1,421 troops to Java. Benjamin Thomas Sigar—then known as Tawalijn or Tawaijlan Sigar—was among nine walak chiefs serving as troop commanders. Fewer than 500 Minahasans were actually deployed, but Sigar was there, fighting against Diponegoro. After the war, he returned to his hometown of Langowan in North Sulawesi, where he was baptized by missionary Johannes Albert Traugott Schwarz and took the Christian name Benjamin Thomas. He was appointed Hukum Besar, or Major District Head, of Langowan. A Dutch-language newspaper obituary in 1880 described him as a local leader who had fought against Diponegoro in the Java War. His descendants married into Prabowo's paternal line when Sumitro Djojohadikusumo married Dora Marie Sigar while both were studying in the Netherlands—Sumitro at an economics school, Dora studying nursing in Utrecht.

Sumitro himself joked about this collision of histories in his 2000 memoir. "Your ancestors sided with Dutch General de Kock, while mine fought alongside the revolutionary Prince Diponegoro, so now you are punished by having to marry me," he recalled telling his wife. Historian Peter Carey noted that the Djojohadikusumo family bore complex scars from the war. Margono was initially barred from visiting Banyak Wide's grave in Gombong, Banyumas, because of his employment with the Dutch administration.

The term "londo ireng" itself carries historical weight that Prabowo's usage obscured. The phrase—literally "black foreigner"—originally referred to West African mercenaries recruited by the Dutch to fill depleted defense posts after the Java War's heavy casualties. By around 1831, it was also applied to indigenous locals who enlisted in the Dutch East Indies army, particularly in war zones. But historians note the term emerged only after the Java War concluded. "So there were no londo ireng present during the capture of Prince Diponegoro," said Suharto, a history lecturer at the University of Jember. Over time, the label expanded to describe any local who served Dutch interests, whether as a soldier or as an aristocrat seeking political power or financial gain.

When Prabowo invoked "londo ireng" in his July 23 speech, his presidential advisor Hasan Nasbi later explained it was used metaphorically—a term for people who prefer to be noisy and pessimistic about the nation. Petrik Matanasi, the military historian, disagreed with the framing. Using the term today, he said, reflects an ahistorical reading of past events. "Using the term today is very irrelevant, inappropriate, and ahistorical." The irony sits uneasily: a president descended from both a nationalist commander and colonial collaborators, invoking the language of colonial betrayal against his critics, while his own family history embodied exactly the kind of compromise with Dutch authority that the term was meant to condemn.