Christoffel Hermanus Kühn (1903–1968) was a South African writer and poet who published under the pseudonym "Mikro" in Afrikaans.

Kühn was born at "Van Reenensplaas" in Williston district of the former Cape Colony (later province of South Africa).

[1] He was at school in Robertson and Carnarvon and continued tertiary education at the Stellenbosch University where he completed a BSc degree in Agriculture.

[1] From 1930 to 1931 he wrote poems for the Afrikaans magazine Die Huisgenoot and published biographies, novels and adventure stories.

His daughter, Cornelia Hilda Kühn, who writes under the pseudonym Corlia Fourie, was born in 1944.