Cognomen マルクス (Markus 
, Marcus , Marx , along with others...) , worldwide, is a widespread surname. The last name マルクス is habitual in Liechtenstein, where it is a common surname, Curacao, and British Virgin Islands, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in the United States, Nigeria, and Germany. More prevalently, マルクス is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Marcus, Marx, Markus | Germany, Nigeria, Brazil, United States, Sweden |
| Marks | Germany, Nigeria, Brazil, Indonesia, United States |
| マルクス | Japan |
| Marcks | United Kingdom, Germany, South Africa, Brazil, United States |
M., Malc, Malchus, Malhus, Malkos, Malks, Malkus, Maluks, Malukus, Malukusu, Marc, Marckx, Marco, Marcos, Marcuse, Marek, Mark, Markas, Markes, Markku, Marko, Marksu, Markuse, Markuss, Markusu, Markús, Maruks, Marukus, Marukusu, Merks, Merx, Márk, Márkus, Märx, Seneca, Μάρκος, Марак, Марек, Марк, Марка, Маркку, Марко, Маркос, Маркс, Марку, Маркузе, Маркус, Маркуш, Марэк, מארק, מארקס, מרכוס, מרק, מרקו, מרקוזה, מרקוס, מרקס, مارك, ماركس, ماركو, ماركوس, ماريك, مارک, مارکو, মার্ক, マルク, マルコ, マルコス, マーカス, マーク, マークス, マーコ, 馬克, 馬克思, 马克, 马克思, and 马尔科