What greek god did mars get its name from?
Actually the Roman gods did not “get” their names from their Greek counterparts; basically what happened is that Roman and Greek religion come from the same Indo-European origin and share many of the same stories and gods/figures, so ancient peoples recognzied Greek gods as having Roman equivalents. The same is true of Nordic gods, incidentally. So, the god of war in Rome was Mars, and the god of war in Greece was Areas, and the god of war was Odin (or Woden in Old English). All three religions (and others) come from the same origin, so similar stories are shared by peoples as far flung as the Irish, Russians, and Indians, too.