- Burke's ''Irish Family Records'' indicates that the first of this family to settle in Cork was Rev. William Somerville, who allegedly fled persecution in Scotland in the 1690s. Col. Thomas Somerville of Drishane, Skibbereen, owned over 450 acres in county Cork in the 1870s while other members of the family owned similar amounts. Thomas Somerville was among the principal lessors in the parish of Castlehaven at the time of Griffith's Valuation while Elizabeth Somerville held townlands in the parish of Skull at the same time.
- The Coghill family, whose main estates were located in counties Kilkenny and Meath, maintained a summer residence in Castletownsend, county Cork, which they leased from the Townsend estate. There were several marriages between members of the family and west Cork families such as Somervilles and Townsends.