Queen Elizabeth: And me, did you miss me, Edmund?
Blackadder: Madam, life without you was like a broken pencil.
Queen Elizabeth: Explain?
Blackadder: Pointless.
[Melchett offers an idea to relieve his and Blackadder's boredom.]
Lord Melchett: Well, perhaps some pleasant word game?
Blackadder: Yes, all right. Make a sentence out of the following words: face, sodding, your, shut.
Answer: The closest we ever get to knowing his first name is in series 3, when he claims it's "Sod Off". Blackadder asks him in series 3 where this came from, and he replies "Well, when I was a kid, living in the gutter, I'd go up to the other kids and say 'Hello, I'm Baldrick'. And they'd say, 'Yes, we know. Sod off, Baldrick.'" The S in this series is likely a reference to that, but it's not addressed, and given this Baldrick is clearly different from the series 3 Baldrick, we can't draw a direct link.
Shay