Surname Сикдер (Sikder 
, Сикдер 
) , worldwide, is a widespread last name. The surname Сикдер is habitual in Bangladesh, where it is quite a common surname, Qatar, and Oman (explore the name in all countries). In absolute terms, the name is most common in Bangladesh, India, and Saudi Arabia. Much less frequently, Сикдер is the forename as well as the last name.