Brigham Young, Jr. (December 18, 1836–April 11, 1903) served as president of the Quorum of the Twelve Apostles of The Church of Jesus Christ of Latter-day Saints (LDS Church) from 1899 until his own death. His tenure was interrupted for one week in 1901 when Joseph F. Smith was the president of the Quorum.
Young married Catherine Curtis Spencer, a daughter of Orson Spencer with the exact same name as her mother, on 15 November 1855.
In Utah Territory, Young became a member of the reconstituted Nauvoo Legion. He was involved in the rescue of the Willie and Martin Companies of Mormon handcart pioneers. He also served in the Utah War with the troops that worked to halt the advance of Johnston's Army.
n 1861, Young was made a member of the Salt Lake Stake high council.
In 1864, Young returned to Europe, this time with his wife Catherine as his companion. He was an assistant to mission president Daniel H. Wells. In 1865, when Wells left for Utah, Young succeeded him as president of the European Mission.
As president of the European Mission of the church in 1866 and 1867, Young preached in France, Switzerland, Germany, Denmark, Sweden, Norway, Russia, the United Kingdom and Ireland. Young also oversaw the emigration of British Latter-day Saints to Utah Territory. It was from a conversation as Young was about to return to Utah at the end of his time as mission president that Charles W. Penrose wrote the hymn "Beautiful Zion For Me".
From October 1890 until February 1893 Young served for a second time as the president of the European Mission. The mission was headquartered in Liverpool, England and Young directly supervised missionary work in the British Isles while also serving as a leader over the mission presidents of the various missions on the European continent.
In 1867, Young was involved with the formation of the Deseret Sunday School Union to provide centralized direction to the Sunday schools of the church.
During 1868, Young acted as his father's agent in finding workers for the Utah portion of the First Transcontinental Railroad.
From 1869 until 1877, Young presided over the Latter-day Saints in Cache Valley, closely assisted by William B. Preston who was serving as the regional presiding bishop. During this time Young co-owned a feed and livery stable in Soda Springs, Idaho with Solomon Hale.
In 1877, Young, Erastus Snow and Wilford Woodruff dedicated parts of the St. George Temple under the general direction of Brigham Young.
From 1877 to 1880 Young served as an editor of the Deseret News along with George Q. Cannon. In 1878, Young and Moses Thatcher selected the site for the Latter-day Saint settlement in the Star Valley of Wyoming. In August 1878, Young dedicated the valley as a place for the gathering of the Latter-day Saints.
In February 1883, Young went on a tour among the Navajo and Hopi peoples with many other church leaders, including Heber J. Grant.
In 1883, Young convinced the residents of Jonesville, Arizona to rename it Lehi. It is today part of Mesa, Arizona.
In 1857 Young married his second wife, Jane Carrington, a daughter of Albert Carrington.
Young's wife Abigail Stevens was one of his younger wives. Their daughter Klara Young Cheney, born in Fruitland, New Mexico in 1894, turned 100 years old in 1994. Abigail and Brigham Jr.'s last daughter, Marian Young, was also born at Fruitland on 15 January 1899. She died on 22 November 2004, less than two months short of her 106th birthday. She was the last grandchild of Brigham Young to die.