Laira – previously recorded as Lare (1591), Lary poynte (1638), the Leerie (1643), and the Lairy (1802) – was originally the name given to that part of the estuary of the River Plym from the Cattewater up to Marsh Mills in Plymouth, Devon, England. The name may derive from a Brythonic word corresponding to the Welsh llaeru, meaning 'to ebb'.