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Cognomen Lias (Lias , Lees , 利亚斯 ) , globally, is a common surname. The surname Lias is characteristic of Isle of Man, where it is quite a common surname, Jersey, and Monaco (explore the name in all countries). In absolute terms, it is commonest in the United Kingdom, the United States, and Australia. Much less frequently, Lias is the forename as well as the last name.