23 May 1951
Sefako Mapogo Makgatho was born at GaMphahlele, in the Pietersburg district in Transvaal (now Limpopo province) in 1861. He was the son of Chief Kgorutlhe Josiah Makgatho of the Makgatho chieftaincy at GaMphahlele. Before embarking on a political career, Makgato wa a teacher and a journalist. Makgatho joined the South African Native  National Congress (SANNC) later renamed the African National Congress (ANC). He became its president at the tail end of World War I, in 1917. As President of the SANNC, Makgatho worked hard to ensure that the movement remained a key factor in the struggle against segregation. It was during Makgatho’s presidency that the ANC is thought to have become radicalized. In 1917 and 1920 Makgatho ensured that the ANC supported the municipal workers strike and the miners’ strike in Johannesburg. In 1923 he was forced to step down and was replaced by Z. K. Mahabane. Makgatho remained President of the Transvaal ANC until the mid 1930s and continued to exert considerable influence in the movement. He died on 23 May 1951 aged 90, the same year, Nelson Mandela’s son from his first marriage with Evelyn was born. In paying tribute to Sefako Makgatho, Mandela named his son after him.
References

SAHO Sefako Mapogo Makgatho[online] Available at: https://www.sahistory.org.za[Accessed on 14 May 2013]|

Sonderling, N.E. (ed.) New Dictionary of South African Biography, v. 2.