The Boyle-Workman family relates to the pioneer interconnected Boyle and Workman families that were prominent in: the history of colonial Pueblo de Los Angeles and American Los Angeles; the Los Angeles Basin and San Gabriel Valley regions; and Southern California — from 1830 to 1930 in Mexican Alta California and the subsequent state of California.
David Workman (November 7, 1797–July 1855) was born in Temple Sowerby, Westmorland,now Cumbria County, England to Thomas Workman (1763–1843) and Lucy Cook (1771-1830.) When he was fourteen years old, his father inherited a home and property in nearby Clifton from a childless uncle and aunt and the family relocated there. A few years later, his parents made cash bequests for their sons, with which David took one half of his allotment and left England for the United States in about 1817, settled eventually in Franklin, Missouri, where he opened a saddlery business. In 1822, he returned to the England, took the remainder of his bequest and convinced his younger brother William Workman (1799–1876) to join him in Missouri.
David ran a successful saddlery for many years, relocating to New Franklin when the original town was destroyed by flooding from the Missouri River and then to Boonville. One of David's apprentices at the saddlery in Old Franklin was Christopher "Kit" Carson, who 'ran away' to Nuevo Mexico in 1826 and became a famed scout, trapper, and explorer. David also made many trips buying and selling general merchandise to and from Mexico and other areas. In 1850, he made a trip to the California gold fields and two years later opened a store in Sacramento, California. After a fire destroyed it and seven-eighths of the town, David visited his brother, William, a successful cattle rancher at the Rancho La Puente, east of Los Angeles, and was convinced to relocate there.