Should you capitalize the word young before a name?

So, let’s say that there’s someone named Zeth.
Now, an elderly he know call him with the word young before his name:

Should it be "young Zeth" or "Young Zeth"?

Truthfully, I just watched a movie or sort capitalized the word young before the name as it is quite make sense if I compare it with something like Elder something or title + name.
But "young" isn’t a title, right?