
Lloyd is the poor commoner kid who is burned alive by the rich noble at the beginning of the story. The rich noble who burned him(the OG Lloyd) alive is the guy with the horse(can't recall his name) taking care of the now-reincarnated prince Lloyd on the battlefield. That guy forgot about what he did until then Nameless reminded him.
Also, the OG Lloyd was friends with Prince Albert which upset the other nobles and led to him being bullied and burned alive. I don't know if Prince Albert knew about the OG Lloyd being bullied or killed on campus but he may have had a feeling that both Lloyd’s have the same aura.

yes, that one with a beautiful greenery background, but I don't remember if something moved or came out of that grave, it was like Schneizel fetched Albert and saying or implying that 'I knew this is where I would find you'.... too add, it seems like the people who knew OG Lloyd are having flashbacks of him during this arc so maybe there's a connection later on?
Why is the Nameless reminding everybody of the OG Lloyd? Is it going to show them who he reincarnated as or will they recall because he has the same face but is younger now?