Hmm. The grid fill wasn't as fearsome as it looked, thanks to some generous clues, and the first name isn't too hard to work out. But having spent twice as long on trying to find the second name as on the rest of the puzzle, I still haven't a clue what it is. The "hint" from the extra down clues isn't helping either.
I'll be interested to know if anyone else is having problems with this, or if I'm just being dim.