There are 151 unique surnames beginning with R:

Rader	Rague	Ralston	Ramage	Ramey	Ramsey	Randall
Randolph	Ransom	Ransome	Ranz	Rapp	Rardin	Rathbun
Raub	Rausch	Raush	Rawlins	Ray	Raybold	Rayford
Raynor	Raypole	Rea	Read	Reading	Reagle	Ream
Reames	Reams	Reason	Reathmaemier	Rector	Reddick	Redick
Reece	Reed	Reeder	Reeley	Reely	Reese	Reeve
Reever	Reeves	Reidel	Reider	Reiter	Renner	Rentschler
Retterer	Reyner	Reynolds	Rhoads	Rhodes	Rice	Rich
Richards	Richardson	Richey	Richman	Richmond	Richter	Richwood & Magnetic Springs Railway Company
Richwood Gazette	Rickard	Rickman	Riddle	Ridegon	Ridge	Ridgeway
Ridgon	Ridley	Riehle	Rigdon	Rigel	Rihley	Riley
Rimmey	Rinehart	Ring	Rings	Rinn	Riser	Ritchie
Rithmaier	Rittenhouse	Ritter	Rizor	Roahen	Robb	Robbins
Robert	Roberts	Robertson	Robinson	Robotham	Robson	Rockhold
Rockwell	Rodemaker	Rodgers	Roe	Roebuck	Roff	Rogers
Rohr	Romine	Romoser	Roney	Roosa	Roots	Rosbrugh
Rose	Roseberry	Rosebrook	Rosenberg	Rosencrants	Rosendale	Ross
Rost	Roth	Rouse	Roush	Rowan	Rowe	Rowland
Rowlands	Rowling	Rowlings	Rozell	Rucker	Rudolp	Rudolph
Rudolphlf	Rudophlf	Ruff	Ruffing	Ruggles	Ruhl	Ruhlen
Rule	Rumer	Runnels	Rupright	Rush	Rusk	Russell
Rust	Rutan	Rutherford	Ryan