It's a name that comes with a story. So they first thing that came to mind when you said that was 'Suibian'. You see, apparently in this other life I had, my sword's name was Suibian.

[He tries to remember the memory where he learned about the sword. He pauses for a second so that he is sure to get it right.]

In this other life, everyone had a sword that was connected to them. So it was their job to name that particular sword. Well when it was being made, they asked the other me what to name it. And he said 'Whatever'. Well...when he got the sword from the maker the word 'Suibian' was carved into it.

And Suibian means 'whatever'. Sounds a little more fun then just calling you whatever.