structural:expansion
Toponymy

The name comes from the Old English lifer, meaning thick or muddy water, and pōl, meaning a pool or creek, and is first recorded around 1190 as Liuerpul. According to the Cambridge Dictionary of English Place-Names, "The original reference was to a pool or tidal creek now filled up into which two streams drained". The place appearing as Leyrpole, in a legal record of 1418, may also refer to Liverpool. Other origins of the name have been suggested, including "elverpool", a reference to the large number of eels in the Mersey. The adjective "Liverpudlian" was first recorded in 1833.

Although the Old English origin of the name Liverpool is beyond dispute, claims are sometimes made that the name Liverpool is of Welsh origin, but these are without foundation. The Welsh name for Liverpool is Lerpwl, from a former English local form Leerpool. This is a reduction of the form "Leverpool" with the loss of the intervocalic (seen in other English names and words e.g. Daventry (Northamptonshire) > Danetry, never-do-well > ne’er-do-well).

In the 19th century, some Welsh publications used the name " Lle'r Pwll " ("(the) place (of) the pool"), a reinterpretation of Lerpwl, probably in the belief that " Lle'r Pwll " was the original form.

Another name, which is widely known even today, is Llynlleifiad, again a 19th-century coining. " Llyn " is pool, but " lleifiad " has no obvious meaning. G. Melville Richards (1910–1973), a pioneer of scientific toponymy in Wales, in "Place Names of North Wales", does not attempt to explain it beyond noting that " lleifiad " is used as a Welsh equivalent of "Liver".

A derivative form of a learned borrowing into Welsh (* llaf) of Latin lāma (slough, bog, fen) to give " lleifiad " is possible, but unproven.