Sandin is a surname of Swedish origin.
Sandín also refers to the surname found in Spain and Latin America, particularly (Brazil, Mexico, Argentina and Uruguay).
[1][2] The distribution of Spanish births, are most common in Zamora with (33,73%) of people with the surname and it being their first Surname, Madrid (14,45%), Cáceres (9,99%) and Salamanca (8,23%).
[3]