Willem Christiaans O.S.F.S., (born 12 February 1961) is a Namibian Roman Catholic prelate.
He served as Apostolic Administrator of the Keetmanshoop diocese while still a priest, from 26 July 2017 until 7 February 2018.
He was born on 12 February 1961 in Gabis, ǁKaras Region, Diocese of Keetmanshoop, Namibia.
He studied philosophy at St. Joseph's Theological Institute in Cedara, KwaZulu-Natal, South Africa, graduating in 1984.
[1][2] As a priest, he held various positions inside and outside his diocese including as:[2] On 7 February 2018 Pope Francis appointed him Bishop of Keetmanshoop, Namibia.