Father and son were both heirsSourced
A sultan named his grandson heir while the boy's father was still heir too.
In 1790, Hamengkubuwono I of Yogyakarta designated his grandson Surojo as crown prince even though Surojo's father Sundoro already held that position. Sundoro became Hamengkubuwono II in 1792; Surojo later became Hamengkubuwono III.
The succession had been marked out two generations ahead.
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Reviewed: 2026-10-02