Wiki information Manumataongo:

Taufaʻahau Manumataongo

HRH Prince Taufaʻahau Manumataongo Tukuʻaho is a Tongan royal, second in the line of succession to the Tongan throne.

Tāufaʻāhau Tupou IV
Noble person, Chivalric Order Member, Person, Deceased Person, Politician

Tāufaʻāhau Tupou IV, son of Queen Sālote Tupou III and her consort Prince Viliami Tungī Mailefihi, was the king of Tonga from the death of his mother in 1965 until his own death in 2006.