Major Thomas Gibson (d.1807) made his fortune in the West Indies’ sugar plantations. The family return to England when Thomas Milner-Gibson (1806-84) was a baby to live in Theberton House, Suffolk. (This site has a comprehensive history of the family.)
In 1823 the family leased land in Islington to invest in housing. The Milner-Gibson estate in London consisted of Theberton Street, Gibson Square, Milner Square, and Milner Place and posts will follow.
Members of the family are buried at the Church of St Peter, Theberton, an interesting church, with a rather overgrown churchyard.