Charles Caesar Cowley (1800-1875) was a Mormon pioneer.

Charles Caesar Cowley, son of Nicholas Cowley and Ellen Kelley, was born on the Isle of Man, December 21, 1800. He joined The Church of Jesus Christ of Latter-day Saints in 1840 and emigrated to Nauvoo, Illinois in 1843. In 1846 he moved with the other Saints to Council Bluffs, Iowa and arrived in Salt Lake City in 1850. Ten years later he settled in Logan, Utah. He died at home on December 26, 1875.

Joseph Enos Cowley (1849-1929) was Mormon pioneer and missionary.

Joseph Enos Cowley, son of Charles Cowley and Ann Killip, was born in Council Bluffs on November 8, 1849. The next year his family moved to Salt Lake City. Ten years later they settled in Logan, Utah. In 1868 he was called to go to Laramie, Wyoming—then the Railroad terminus—to escort Latter-day Saint emigrants into the Salt Lake Valley. On the journey he met Catherine Worley, whom he married on July 5, 1875, in the Salt Lake Endowment House. She died in 1891 and in 1902 he married Bessie W. Jackson. In 1875 Joseph was called to the British Mission and while there visited with relatives on the Isle of Man, obtaining extensive genealogical records of the Cowley family, which he recorded in his father’s journal, housed in this collection. He later performed or saw that the temple work was performed for all of these ancestors. Joseph died on October 17, 1929 in Logan, Utah.

Jense Christian Larsen Breinholt (1841-1914) was a Mormon pioneer and missionary.

Jens Christian Larsen Breinholt was born September 8, 1841 in Vinding, Denmark. He was converted to The Church of Jesus Christ of Latter-day Saints while working for a Mormon family in Denmark and immigrated to Utah, locating in Redmond, Sevier County. Breinholt served a two-year mission to Denmark. He was imprisoned for polygamy in 1889 and eventually immigrated to Juarez, Mexico to flee further persecution for the same offense. However, civil unrest eventually forced him and his family to re-immigrate to Utah, where they returned to their former home of Redmond. He died in Redmond on November 5, 1914. Jens was a father-in-law to Roda Cowley Breinholt (1896–1962), a great-granddaughter of Charles Cowley.

Arlene B. Jensen (1935- ) was a Mormon housewife and genealogist from Logan, Utah.

Arlene Breinholt Jensen was born on September 24, 1935 to Sterling and Maurine Cowley Breinholt in Venice, Utah. She attended Utah State University and married Bartell C. Jensen. They eventually settled in Logan, Utah. She and her husband were active in the Church of Jesus Christ of Latter-day Saints and served in a number of callings. In 1995 Bartell C. Jensen was called as a mission president for the Church. Arlene Breinholt inherited a number of historical items from the Cowley and Breinholt families and compiled a scrapbook of genealogical information on the Cowley family.