Frederick Zadok Rooker (1861 – 1907) was an American Catholic prelate who served as the first Bishop of Jaro from 12 June 1903 until his death on 18 September 1907.

At the end of his junior year studies, Frederick went to Rome to pursue formation for ordination to the priesthood at the Collegium Urbanum, which is under the immediate direction of the Propaganda Fidei (now called Congregation for the Evangelization of Peoples).

[3] He was consecrated by Sebastiano Cardinal Martinelli, O.E.S.A, Cardinal-Priest of the Basilica of Sant'Agostino, Rome and who was his former Superior at the Apostolic Delegation in Washington, D.C., on 14 June 1903.

[6] The Bishop also invited the Sisters of St. Paul of Chartres to serve in his Diocese, which included at that time half of the States of Visayas and of Mindanao.

Hearing this, the Americans volunteered to accompany the Bishop, who dared to celebrate the Mass with a revolver beside him on his episcopal throne.

[8] Another important act that Rooker accomplished as Bishop of Jaro was the immediate rebuilding of St. Vincent Ferrer Seminary after it was reduced into heaps of ashes by a fire from a candle, which was carelessly left burning in the sacristy, on 7 October 1906.