What does Ruff stand for?

Ruffhead's Edition of the Statutes, by Serjeant Runnington - 1235-1785 - A publication (DLA)

Ruffin and Hawks' Reports - 8 North Carolina - A publication (DLA)

Statutes at Large, Ruffhead's Edition - England - A publication (DLA)

Rescuing Unwanted Furry Friends (EARSL)

Ruff - Common English name - Scientific name: Philomachus Pugnax - American Ornithologists Union four-character bird identification (IBP)