Phineas Howe Young was a prominent early convert in the Latter Day Saint movement and was later a Mormon pioneer and a missionary for the Church of Jesus Christ of Latter-day Saints. Phineas Young was an older brother of Brigham Young, who was the president of the LDS Church and the first governor of the Territory of Utah.

Missionaries of the Church of Jesus Christ of Latter-day Saints —widely known as Mormon missionaries—are volunteer representatives of the church who engage variously in proselytizing, church service, humanitarian aid, and community service. Missionaries of the LDS Church may be male or female and may serve on a full- or part-time basis, depending on the assignment. Missionaries are organized geographically into missions, which could be any one of the 411 missions organized worldwide. This is one of the practices that the LDS Church is well-known for.