Sylvester William Treinen

Sylvester William Treinen (November 19, 1917 – September 30, 1996) was an American prelate of the Roman Catholic Church.

[2] As a priest of the Diocese of Bismarck in North Dakota, Treinen was a curate in Dickinson from 1946 to 1950, and secretary to Bishop Vincent James Ryan and his successor, Bishop Lambert Anthony Hoch, from 1950 to 1953.

[3] On May 23, 1962, Treinen was appointed the fifth Bishop of Boise in Idaho by Pope John XXIII.

[2] He received his episcopal consecration on the following July 25 from Bishop Hilary Baumann Hacker, with Bishops Peter William Bartholome and Lambert Hoch serving as co-consecrators.

Sylvester Treinen died in Missoula, Montana, at age 78.