MacBain’s dictionary :
Quote:
poll: a pool, a hole, mud, Irish, Early Irish poll, Welsh pwll, Cornish pol, Breton poull; from Late Latin padulus, pool, a metathesis of palus, paludis, marsh (Gaidoz), whence It. padula, Sp. paúl. Teutonic has Anglo-Saxon pól, English pool, Dutch poel, Old High German pfuol, German pfuhl. Skeat considers that poll is from Low Latin padulis, and that the Anglo-Saxon pól was possibly borrowed from the British Latin or Latin remains seen in place-names having port, street, -chester, etc.