R R.i.c.

Radar

Radio

Rafe (means angel)

Ragdoll

Rage

Raggedy ann

Raging bull

Ragmop

Rags

Ragtime

Ragu

Raider

Rain

Rainbow

Raisin

Raja

Rajah

Ralph

Ralphie

Rambo

Rancher

Randi

Randolph

Ranger

Rascal

Rasselas

Rasta

Ravel

Raven

Rawhide

Ray

Razz

Razzie

Razzmatazz

Rebel

Red

Red dog

Red or redhead

Redbeard

Reddy

Reebok

Reef

Regalo

Regis

Rem

Remington

Remo

Remy

Ren h

Renegade

Reno

Repo

Reuben

Rex

Rex the runt

Rex the wonder dog

Rhapsody

Rhea

Rhett

Rhinestone

Rhino

Rhodes

Rhone

Rhumba

Ribsy

Riches

Ricky-ticky-tavi

Rico

Ricochet

Ricotta

Rider

Riff raff

Riffraff

Riley

Rin tin tin

Ringleader

Ringo

Rio

Riolu

Rip van winkle

Ripley

Ripli

Ripple

Ritz or ritzy

Roach

Road rovers

Roadkill

Rob roy

Robowan

Rocca

Rock

Rocker

Rocket

Rocko or rocky

Rocky

Rococo

Rodeo

Rodney

Rogan

Roger

Rogue

Rojo

Rolex

Rolls

Rolly

Rolo

Roly

Roma

Romeo

Romulus

Romy

Rondeau

Rontu

Roo (kangaroo)

Roobarb of roobarb

Rookie

Rooster

Root beer

Rosarita

Roscoe

Rose bud

Rosebud

Rosie

Rot

Rothschild

Rotten

Rover

Rover dangerfield

Rover rob

Roverandom

Rowdy

Rowf

Rowlf

Roxanne

Roxie

Roxy

Roy

Royal

Ruby

Ruby-doo

Rude dog

Rudee

Rudy

Ruff

Rufferto

Ruffian

Ruffles

Rufus

Rugby

Ruggers

Rugrat

Ruler

Rumbo

Rumpelstiltskin

Runner

Runt

Rupert

Rush

Russell

Rusty

Ruthie

Ryan