- While human habitation of many parts of the world is sporadic and largely undocumented beyond a few centuries, Great Britain is central to periods including the Mesolithic, Neolithic, Bronze Age and Iron Age.
- The 1881 census shows that Smith was the most common surname in the majority of English counties. Jones, Williams, Graham, Thompson, Harris and Atkinson also led in one or more counties.
- Index population data compares relative concentration of surnames in individual counties to that of the national population. This shows which families have recently experienced upward social mobility and often predicts continued trends. For Essex County in 1881, Allston was the leading name by index. Dacosta led London, Lynds led Kent and Turrill led Oxfordshire.
- Several online websites specialize in family history and have extensive lists of surnames from the 1800s and earlier. Generational documentation is also available and might help connect distant relatives.