- Rabaduex
- Rabideau
- Rachlow
- Radeke
- Radford
- Radtke
- Radu
- Rafferty
- Rager
- Ragon
- Rahn
- Raines
- Rajcany
- Raleigh
- Ramsey
- Randall
- Randolph
- Rang
- Ranger
- Ranochak
- Ransbottom
- Rapp
- Rash
- Rasor
- Rassuli
- Ratcliff
- Rathbun
- Ratliff
- Ratty
- Raugh
- Ravovskis
- Ray
- Reader
- Rearick
- Reason
- Rebeck
- Reber
- Rebman
- Reche
- Rectanus
- Redd
- Redden
- Redding
- Redfield
- Redman
- Reed
- Reeder
- Reese
- Reesman
- Reibs
- Reich
- Reichard
- Reichenbach
- Reichert
- Reid
- Reidenbach
- Reidhaar
- Reidt
- Reifenberg
- Reighter
- Reilley
- Reilly
- Reinhart
- Reinholt
- Reinking
- Reisgies
- Reising
- Reiter
- Reith
- Rekeweg
- Remenicky
- Remissong
- Remke
- Remley
- Renbarger
- Render
- Reneker
- Renie
- Renier
- Rennecker
- Renninger
- Renno
- Rensberger
- Rentchler
- Rentschler
- Replogle
- Reuille
- Reul
- Reum
- Revett
- Rexroth
- Rey
- Reynolds
- Rhee
- Rhinehart
- Rhoades
- Rhodenbaugh
- Rhodes
- Rice
- Rich
- Richard
- Richards
- Richardson
- Richardville
- Richeson
- Richey
- Richmond
- Richter
- Richwine
- Ricker
- Rickert
- Riddle
- Ridenour
- Rider
- Ridley
- Riebersal
- Rieck
- Riecke
- Riecken
- Rieke
- Riemen
- Rietdorf
- Riethmiller
- Rife
- Riggs
- Rigsby
- Riley
- Rinearson
- Rinehart
- Ringenberg
- Ringo
- Rinker
- Riordan
- Ripley
- Rippe
- Rison
- Ritchie
- Ritenour
- Rivera
- Roach
- Robart
- Robbins
- Roberson
- Roberts
- Robertson
- Robins
- Robinson
- Robison
- Robles
- Roby
- Rochyby
- Rockhill
- Rockstroh
- Rodenbeck
- Rodgers
- Rodocker
- Rody
- Roe
- Roebel
- Roeben
- Roehling
- Roehrs
- Roelke
- Roemer
- Roemke
- Roesener
- Roethele
- Roethemeyer
- Roets
- Rogan
- Rogers
- Rohan
- Rohling
- Rohrbach
- Rohrbacher
- Rohrs
- Rolf
- Rolfsen
- Roling
- Rolland
- Romano
- Romary
- Romero
- Romey
- Romine
- Rommel
- Rondot
- Roof
- Roop
- Roose
- Rorick
- Rose
- Rosenberger
- Rosenhahn
- Roser
- Ross
- Rosswurm
- Roth
- Rothberg
- Rothenbush
- Rothermel
- Rothgeb
- Rouch
- Rounds
- Rouns
- Rountree
- Roush
- Rousseau
- Roussel
- Routt
- Rowan
- Rowe
- Rowlee
- Roy
- Royal
- Royse
- Rozema
- Rozewicz
- Ruble
- Rubrich
- Ruch
- Ruckman
- Rudolph
- Ruf
- Ruff
- Rufner
- Ruggles
- Ruich
- Ruiz
- Rumpel
- Rumschlag
- Rumsey
- Runge
- Runnion
- Runyan
- Rupel
- Rupert
- Ruple
- Rupley
- Rupnow
- Rupp
- Ruppel
- Ruppert
- Ruprecht
- Ruse
- Rusher
- Rusk
- Russell
- Rust
- Rutledge
- Rutz
- Ryan
- Rykard
- Ryker
- Ryman
- Rysman