While building his fortune, Davis fathered three illegitimate daughters, born 1811 through 1823. It was not unusual for unmarried men to have relationships and children before marriage. It is not known if the daughters had the same mother. Davis acknowledged them publicly, arranged for them to be educated, supported them, and brought them to live in his household for periods of time. Each of the three girls eventually married, aided by their father's wealth and status. They were Florida Ann Davis (b. 31 March 1811, d. 18 January 1891, Warren County, Mississippi); Mary Lucinda Davis (b. 1 May 1816, d. 22 November 1846, near Vicksburg, Mississippi); and Caroline Davis (b. – d. 13 July 1907, Williamsburg, Virginia). In 1827, the 43-year-old Davis decided to marry and retire from law. He used his savings to buy land and slaves to become a planter. Davis also adopted two children, Joseph D. Nicholson, the infant son of Mrs. Jane Nicholson, and Martha Quarles, daughter of John Quarles. Martha Quarles was the granddaughter of Martha Brooks Wallace. Martha Wallace reared her until age 13 when the girl started living in Davis's household. He was a friend of
Margaret Louisa Kempe Howell, whom he had known in his youth, serving as a groomsman at her wedding and accompanying her on a trip to New York. Howell's daughter,
Varina, later married Davis's brother. ==Mississippi planter==