Siaosi Vuna Takitakimālohi (c. 1844 – January 1862) was a Prince of Tonga, the only legitimate son and heir to King George Tupou I.

[2] Prince Vuna's half-siblings include Tēvita ʻUnga and Sālote Mafileʻo Pilolevu, who were repudiated by their father as illegitimate offspring along with their mothers, who were his secondary consorts, after his marriage in 1834 to Prince Vuna's mother under Christian rites.

[4] At the age of seventeen or eighteen, Prince Vuna died in January 1862, unmarried, leaving his father without an heir.

At the prince's funeral, the King allowed his subjects to restore the traditional rite of tukuofo, the offering of mats and food to the dead.

[5] The succession would remain vacant for thirteen years until the promulgation of Tonga's first constitution in 1875, which legitimized Vuna's half-brother Tēvita ʻUnga and named him Crown Prince.