About Sobhuza II
Sobhuza II (Swazi: [sɔbʱuzʱa]; also known as Nkhotfotjeni, Mona; 22 July 1899 – 21 August 1982) was Ngwenyama (King) of Swaziland (now Eswatini) for 82 years and 254 days, the longest verifiable reign of any monarch in recorded history. Sobhuza was born on 22 July 1899 at Zombodze Royal Residence, the son of Inkhosikati Lomawa Ndwandwe and King Bhunu. When he was only four months old, his father died suddenly while dancing incwala. Sobhuza was chosen king soon after that and his grandmother Labotsibeni and his great-uncle Prince Malunge, a son of Mbandzeni, led the Swazi nation until his maturity in 1921. Sobhuza was acknowledged as King by the British in 1967, and Swaziland achieved independence in 1968. Sobhuza continued to reign until his death in 1982. He was succeeded by Mswati III, his young son with Inkhosikati Ntfombi Tfwala, who was crowned in 1986. Sobhuza's official incumbency of 82 years and 254 days is the longest precisely dated monarchical reign on record and the world's longest documented reign of any sovereign since antiquity. As a consequence, acting through his advisory council, he formed the Imbokodvo National Movement, a political party, which contested and won all seats in the 1967 pre-independence elections.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.