Last name Эрнестин (Ernestine 
, Эрнестин 
) , worldwide, is quite a common cognomen. The surname Эрнестин is habitual in Sub-Saharan Africa, particularly Cameroon, where it is quite a common surname, Rwanda, where it is quite a rare surname, and Mauritius. Not in comparison with a country's population, it is commonest in Cameroon, Indonesia, and Rwanda. More frequently, Эрнестин is the forename as well as the last name.