a bird
Ruff Johnson
A ruff is a pot-bellied bird with a long neck. The female is smaller than the male of the species and a female ruff is a reeve.
reeve
shelby ruff
Raychell Ruff's birth name is Rachel Ruff.
Michelle Ruff's birth name is Michelle Suzanne Ruff.
Patapoutian
Dennis the Menace's first dog was Gnasher, but later the dog's name was Ruff.
Ruff
2002 by Ruff (first female prez)
The Ruff Riders
Isaac from Fetch with Ruff Ruffman does not have a confirmed last name. He is often referred to as just "Isaac" on the show.