Family name Mugir (Muir 
, Mugir 
) , in all the world, is a common surname. The family name Mugir is habitual in British Virgin Islands, where it is quite a common surname, Jamaica, and New Zealand (explore the name in all countries). In absolute terms, it is the most numerous in the United Kingdom, the United States, and Australia. Much less frequently, Mugir is the forename as well as the last name.