comment the consistently used name is just marc as is demonstrated through a wide range of results for search site mta maryland gov marc the texts from the first page of results were marc train service marc train posts delay information and on time performance the penn line of the marc train service marc weekly and monthly tickets marc now offers weekend service penn line trains will have the marc bike car in the train mta strives to make it as convenient as possible for marc riders to stay informed and up to date the marc riders advisory council marc train and commuter bus tickets the new parking garage at the savage marc station site mta maryland gov marc gets about results site mta maryland gov marc train gets about results many of these results don't come from text but from a repeated link reading marc train site mta maryland gov wikipedia marc and penn line or camden line or baltimore penn station gives many results other than marc train suggest kaye