Etymology
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Liverpool 
English city on the River Mersey, c.1190, Liuerpul "Pool with Muddy Water," from Old English lifer "thick, clotted water" + pol (see pool (n.1)). "The original reference was to a pool or tidal creek now filled up into which two streams drained" [Victor Watts, "Cambridge Dictionary of English Place-Names," 2004]. The adjective and noun Liverpudlian (with jocular substitution of puddle for pool) is attested from 1833.
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Kelly 
common Irish surname, from Old Irish ceallach "war." As a type of pool played with 15 balls, it is attested from 1898. Kelly green first recorded 1917.
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Bethesda 
1857, name of a pool in Jerusalem (John v.2), from Greek Bethesda, from Aramaic (Semitic) beth hesda "house of mercy," or perhaps "place of flowing water." Popular among some Protestant denominations as a name for religious meeting houses.
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