Who are the men in lunch on top of a skyscraper?

There are somewhat differing accounts of who these men were.

A list supplied by a WikiAnswers member follows, starting from the left:

1. Martin "Matty" O'Shaughnessy (Ireland)
2. James Joy (Ireland)
3. Austin Lawton (Newfoundland)
4. John Charles Cook (Native American)
5. Claude Stagg (Newfoundland)
6. John Patrick Madden (Irish)
7. "Stretch" Donahue (Ireland)
8. Francis Michael Rafferty (Ireland)
9. Thomas Enright (Ireland)
10. Thomas "Norton" Naughton (Ireland)
11. Patrick "Sonny" Glynn (Ireland)

The list in Wikipedia is as follows (source link below), starting from the left:

1. Matty O'Shaughnessy from County Galway, Ireland
2. ?
3. Austin Lawton of King's Cove, Newfoundland
4. ?
5. Claude Stagg of Catalina, Newfoundland.
6. John Patrick Madden,( Irish)
7. ?
8. Francis Michael Rafferty
9. Stretch Donahue
10. Thomas Norton (born Naughton) of County Galway, Ireland
11. either Patrick "Sonny" Glynn of County Galway, Ireland or Gusti Popovič, a Slovak from Czechoslovakia

One WikiAnswers writer added this:

At least two of the men (the second and third from the right) are Hungarian. The third man from the right is Louis Friedman who was 28 at the time this picture was taken. Louis identified himself in this picture in the 1980's. Mr. Friedman identified the second person from the right as his brother.