They’re alive!
No I’m just kidding, what I think might be the case is that Henry is family to Lord Radzig, because it would explain a lot. This could be the case in two ways:
-Henry’s mother was Lord Radzig’s mistress and Henry is his bastard son, and because he needed a father Radzig’s good friend, the Prague blacksmith Martin moved to Skalitz and married the woman.
-Martin is a half-brother or something (most likely a bastard of his father) to Radzig and moved to Prague in his youth so nobody would find out he’s the lord’s bastard and later moved back to be near his family (maybe when the old lord Kobyla died).
Obviously Henry’s father and lord Radzig know each other well, and Radzig knows his mother too. He’s protective of Henry and trusts him suspiciously well. And [SPOILER WARNING] at the Talmberg lookout after the Pestilence quest he softly calls him “son”.
I’ve not finished the game and don’t know what more there is about this, but it’s a thought I’ve had.
If anyone has any thoughts or insights I’m curious to read them.