What does the name 'Marcus' represents/means? Do you think it's a good name?

Marcus is a masculine given name of Ancient Roman pre-Christian origin derived either from Etruscan Marce of unknown meaning or referring to the god Mars. Because Mars was identified as the Roman god of War, the name 'Marcus' can by extension be taken to refer to Ares in the Greek pantheon.

No one knows for sure what it meant in the original Etruscan but it may have been related to the Roman god Mars.

i think its a good name