CA ———
Cabell Caddell Caddy Cade Cadena Cady Caffrey Cage Cagle Cahoone Caine Cairncross Cairns Caldwell Calladine Callahan Callanan Callenback Calliott Callis Calvin Cameron Campbell Canfield Cannedy Cannetta Cannon Cantor Cantrell Cantwell Capannari Capetillo Capone Capotorto Capp Capper Capron Cardigan Carleton Carlton Carothers Carpenter Carr Carroll Carter Cary Case Cash Caskey Casslen Castor Caton Catt Cawkwell

CE ———
Cecil

CH ———
Chadbourne Chaddock Chadeayne Chalmers Chamberlain Chamberlin Chambers Champ Chance Chandler Chapen Chapin Chaplin Chapman Chappel Chartier Chaves Chaytor Cheatham Cheney Chesnut Chester Chiafullo Chickering Chilcote Chilvers Chinn Chirgwin Chisham Chrisman Christensen Christian Christman Christophersdatter Chroninger Chute

CI ———
Cianciarulo Cimiotti Cinnamon Cinnamond Cira Cire

CL ———
Claas Clancy Clark(/Clarke) Clasby Clauder Clay Clayton Cleaver Cleburne Clemens(/Clemmons/Clemons) Clement Clerf Cleveland Clewell Clifford Clifton Cline Cloar Cloherty Cloud Clough Clulow Clune

CO ———
Coad Coates Coath Cobb Coburn Cochise Cochran/Cochrane Cocke Cody Coe Coffey Coffin Coggins Cogley Coil Coker Colby Coldren Cole Colegrove Coleman Colenso Coles Collier Collins Colson Colter Colvin Comegys Comet Compton Condley Condren Conklin Conley Conn Connally Connell Conner Connery Connors Conrad Converse Conway Cook Cooke Cooley Coolidge Cooper Copeland Coppage/(Coppedge) Coppenbarger Coppinger/(Copinger) Corbet Corbett Cordle Cords Corey Cormier Cornelius Cornett Corson Cosgrove Costa-Leite Cote Cotton Couch Couglan Counts Coupland Courson Courtemanche Courty Cousins Covert Cowan Cowen Cox Coyan

CR ———
Crabbe Cracraft Cracroft Craig Crais Cramer Crans Crawford Craycraft Craycroft Creacall Creager Creamer Creel Cressy Cretney Crider Criscuolo Crisman Cristman Crites Cromwell Cronkrite Crooker Croom Crosby Cross Crossland Crossley Crossman Crouch Crow Crowder Crowe Crowl Crowson Cruise Crump Crutchley

CU ———
Cuddeback Cuddy Cudworth Cuesta Culbert Cullinane Culp Culpepper Cummins Cunningham Cupid Cupp Cupples Curd Cure Curl Curle Curlee Curlin Curran Curreen Current Currie Currier Currington Curry Curtis(/Curtiss) Curts Cusenbary Cushman Custer Cutchie Cuthbert Cuthbertson Cutler Cutright Cutter

CY ———
Cyr