John ya Otto Nankudhu (1933–2011, nom de guerre: Koshiwanda, the surname is sometimes also spelled Nankugu) was a Namibian guerrilla, army officer and politician. He was the commander of the forces of the People's Liberation Army of Namibia (PLAN) at Omugulugwombashe when the armed struggle for independence began there on 26 August 1966 and was later jailed for 17 years at Robben Island. He is a National Hero of Namibia for his contributions to the independence of the country.
Nankudhu was born on 24 June 1933 at Oluhapa in northern Namibia. He joined the Ovamboland People's Congress, the predecessor of SWAPO, in 1958, shortly after its foundation. He quickly ascended to become its chairman for Oranjemund. In 1960 he went into exile. He received military training in Egypt until 1963 and thereafter joined a military academy in the USSR where he completed training in 1964.
Nankudhu returned to Africa in 1964 and, already in the rank of a commander of the People's Liberation Army of Namibia (PLAN), started a military training camp in Kongwa, Tanzania. In 1966 he moved into Namibia as one of the first six guerrillas to mobilise and train people for armed resistance. Under his leadership a reconnaissance camp near Ongandjera was established in January, and a training camp at Omugulugwombashe in June.
In 1966 the UN General Assembly revoked South Africa's mandate to govern South West African territory and placed it under direct UN administration. South Africa refused to recognize this resolution. The group under Nankudhu had just started to build defensive structures and planned to train about 90 soldiers at Omugulugwombashe.