Surname Sonsi (Soni 
, Sonsi 
) , worldwide, is a widespread last name. The surname Sonsi is habitual in Guernsey, where it is quite a common surname, India, and United Arab Emirates (explore the name in all countries). Not in comparison with a country's population, the name is most common in India, Indonesia, and United Arab Emirates. Also, Sonsi is the forename as well as the last name.