Surname マーカー (Marker 
, マーカー, Mercker 
) , around the world, is a common cognomen. The family name マーカー is habitual in Denmark, where it is quite a common surname, Austria, where it is quite a rare surname, and Germany. In absolute terms, it most frequently occurs in the United States, Germany, and Denmark. Much less frequently, マーカー is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marker | Germany, Denmark, Argentina, United States, India |
| Mercker | Germany, Canada, France, Brazil, United States |