E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A contraction of Lindum-colonia. Lindum was an old British town, called Llyn-dune (the fen-town). If we had not known the Latin name, we should have given the etymology Llyn-collyne (the fen-hill, or hill near the pool), as the old city was on a hill.