Surname Bulge (Bulga 
, Bulge 
, Boulge 
) , in all the world, is a rare cognomen. The cognomen Bulge is habitual in Mongolia, where it is quite a rare surname, Poland, where it is a rare surname, and Romania. Measured by absolute frequency, the name is most common in Poland, Thailand, and Mongolia. Also, Bulge is the forename as well as the last name.