Apollinaris William Baumgartner

The Most Reverend Apollinaris William Baumgartner, O.F.M. Cap.
Bishop of Agaña
Church	Roman Catholic Church
See	Diocese of Agaña
Installed	14 August 1965
Term ended	18 December 1970
Predecessor	León Angel Olano y Urteaga
Successor	Felixberto Camacho Flores
Orders
Ordination	30 May 1926
Personal details
Birth name	William Baumgartner
Born	24 July 1899 College Point, Queens, New York City, New York, United States
Died	18 December 1970 Hagåtña, Guam
Buried	Hagåtña, Guam
Nationality	American

Apollinaris William Baumgartner, O.F.M. Cap., D.D., (24 July 1899 – 18 December 1970) was a prelate of the Roman Catholic Church, serving as Bishop of Agaña, Guam, from 1945 to 1970.

William Baumgartner was born in College Point, Queens, New York City, New York, United States, to William Lawrence Baumgartner and Elizabeth (née Wurtz) Baumgartner. He attended St. Fidelis School, the parochial elementary school of St. Fidelis Parish in College Point, and already had decided to become a Capuchin friar by the time he was to start high school. He boarded at St. Lawrence College in Mount Calvary, Wisconsin, a seminary high school run by Capuchin Franciscans. He later received a Doctor of Divinity.

Baumgartner was ordained a Capuchin priest on 30 May 1926, taking the name Apollinaris, the name of many famous Catholic saints and bishops. On 25 August 1945, Pope Pius XII appointed him Vicar Apostolic of Guam and Titular Bishop of Ioppe. He was consecrated on 18 September 1945, with Archbishop Amleto Giovanni Cicognani, Titular Archbishop of Laodicea in Phrygia, serving as Consecrator, and Bishop Eugene Joseph McGuinness, Titular Bishop of Ilium, and Bishop Bartholomew Joseph Eustace, Bishop of Camden, serving as Co-Consecrators.