Jacobus (Koos) Johannes du Plessis (May 10, 1945 - January 15, 1984) , aka Koos Doep, was a prominent South African singer-songwriter. Although he received critical acclaim for much of his work, he became best known for the runaway success of a rendition of his song "Kinders van die Wind" (Children of the Wind) by Laurika Rauch.

Koos du Plessis was born in Rustenburg. He was the youngest of four children, and grew up in the mining town of Springs. After school, he attended the University of Pretoria, and the University of the Witwatersrand, majoring in Afrikaans-Nederlands (Afrikaans-Dutch). At university he met his future wife, Mornay. The couple had three daughters, Irma, Karien en Karla. Koos would eventually write a song for each of these four women in his life.

Koos worked as journalist and editor for several Afrikaans publications (Oggendblad, Die Vaderland, Die Nataller en Die Transvaler). He died in a car accident close to Krugersdorp during the early morning hours of January 15, 1984

In 2010 a biography with cd is released in the Benelux-countries in the Tussen Kontinente-series.

Discography
Ofschaaid Zunder Woorden (2010)
Die Land van Blou Saffiere (2010) ISBN 978-90-815659-1-2
"Die Vierde Horison" (2004) Trio Records INH CD 009
"Skadu's Teen Die Muur..." (1979) Trio Records INHCD 005 Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.