In 2018, 26 is the most common age for an American (U.S.) Marcus who is registered male with the Social Security Administration. It is the 277th most common male first name for living U.S. citizens.
― Anonymous User 10/15/2018
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Marcus Eaton is a character in Veronica Roth's Divergent series. He is abusive to his son Tobias.
― Anonymous User 1/10/2015
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Hiya! Marcus is a very common name in Sweden. I don't know if it is necessary to mention in description but I wanted to tell you anyways. [noted -ed]I'm almost 100% certain that I've read in a book about Swedish names that Marcus/Markus means "protected by Mars"/"son of Mars". Though I can't say for sure so I will look it up later.
https://en.m.wiktionary.org/wiki/Marcus#German
https://de.m.wiktionary.org/wiki/Marcus
https://en.m.wikipedia.org/wiki/Marcus_(name)
https://forebears.io/forenames/marcus