Longest-serving family of lighthouse keepers

Five generations and eight members of the Knott family (UK) were lighthouse keepers for a combined 278 years of service between 1730 and 1910. The family profession started with William Knott who maintained South Foreland Low lighthouse in Kent between 1730 and 1780; the line ended with Henry Thomas Knott who retired from Skerries Lighthouse in the Isle of Anglesey off Wales in 1910.

The Knott family members and their career spans and lighthouse locations served in are below:

- William Knott: 1730–80 at South Foreland Low (Kent)

- Henry Thomas Knott: 1818–63 at South Foreland Low

- Henry Knott: 1841–80 at South Foreland Low and Flamborough Head (East Riding of Yorkshire)

- John Knott: 1841–51 at South Foreland Low

- George Knott: 1847–91 at South Foreland Low, Eddystone (Devon), Bideford (Devon), Bull Point lighthouse (Devon) and North Foreland (Kent)

- Henry Thomas Knott: 1873–1910 at South Foreland Low, Skerries (Anglesey, Wales), Minicoy (Maliku Atoll in Lakshadweep, India), St Ann's Head (Pembrokeshire, Wales), South Stack (Anglesey, Wales) and Start Point (Devon)

- Edmond Horton Knott: 1892–1902 at South Foreland Low and The Smalls (Pembrokeshire, Wales)