I know there are a lot of popular songs to where the same title can be landed on. That is not something intended, I usually find out later. There is a form of cross marketing in that sense.
I find same names more often with artists names. The names are often not copyheld. How could names like saga or genesis or even something more obscure like my artist name be copyheld?
We can not be listed under a number with a track listing.
But song titles are most often familiar because the names are part of normal speech.
Outside of some prog or neo-pop acts.
But that has probably even been hit on at some point.