Family name 利思 (Lisi 
, Leith 
, Leath 
) , in all the world, is a common surname. The cognomen 利思 is characteristic of Italy, where it is quite a common surname, Albania, and Trinidad and Tobago, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Italy, the United States, and the United Kingdom. Likewise, 利思 is the forename as well as the last name.