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Cognomen Leech (利奇 , 里奇 , Leech , along with others...) , across the world, is a common family name. The last name Leech is habitual in Northern Europe, particularly Isle of Man, where it is quite a common surname, Guernsey, and Jersey (explore the name in all countries). Measured by absolute frequency, it is commonest in the United Kingdom, the United States, and Australia. Much less frequently, Leech is the forename as well as the last name.