Nettehi was a planet located in the Unknown Regions' Nettehi system, which was located within Holy Paataatus space. The planet was the homeworld and hive-home of the Paataatus sentient species, and their government of the Paataatus Hiveborn. Around 19 BBY, Nettehi was subjugated by the Nikardun species' hegemony, the Nikardun Destiny, which attacked Csilla, capital planet of the Chiss Ascendancy, with Paataatus forces.
The attack failed, and the Chiss dispatched a task force commanded by Admiral Ar'alani to Nettehi, delivering a retaliatory strike on the hive-home. Around a year after the attack on the Paataatus, a Nikardun force was still in control of Nettehi. The Paataatus leader, the Prince Militaire, teamed up with Thrawn, who had come to Nettehi looking for information on the Vagaari pirates, and defeated the Nikardun above the planet. Following the Nikardun's defeat, the Nikardun enslavers on the planet were killed by the Paataatus.
Nettehi first appeared, albeit unnamed, in the 2020 novel Thrawn Ascendancy: Chaos Rising, the first volume in Timothy Zahn's Ascendancy Trilogy. The homeworld of the Paataatus was named in the 2021 novel Thrawn Ascendancy: Greater Good, the second installment in Zahn's Ascendancy Trilogy.
Nettehi first appeared, albeit unnamed, in the 2020 novel Thrawn Ascendancy: Chaos Rising, the first volume in Timothy Zahn's Ascendancy Trilogy. The homeworld of the Paataatus was named in the 2021 novel Thrawn Ascendancy: Greater Good, the second installment in Zahn's Ascendancy Trilogy.