Caesar
Latin: long-haired
(Cesar, Cezar)

Calbert
Old English: shepherd or herdsman
(Cal, Calburt, Calvert)

Caldwell
Old English: near the cold well or spring
(Cal)

Caleb
Hebrew: faithful, bold
(Cal, Cale)

Calhoun
Celtic: warrior
(Cal)

Calum
Gaelic: dove, or messanger of peace
(Callum, Cal)

Calvin
Latin: bald
(Cal, Vin, Vinny, Vinnie)

Cameron
French: a field
Scottish: crooked nose, and the name of a Scotish clan
(Cam, Cammy, Cammie, Ron, Camp, Campy)

Canute
Scandinavian: knot or knotted
(Knut, Knute)

Carl
Teutonic: farmer
(Karl)

Carlson
Old English: Carl's farm
(Carl, Carlton, Charlton)

Carlin
Gaelic: little champ
(Carl, Carlie, Carly, Carling)

Carlisle
Old English: from the walled city
(Carlyle)

Carlo
Italian: manly
(Carlos)

Carmine
Latin: song

Carr
Old Norse: dweller at a marsh, or mysterious one
(Carew, Kerr)

Carter
Old English: driver of a cart
(Cart)

Carver
Old English: wood carver

Cary
English: fort
Welsh: stony island
(Carey)

Casey
Celtic: valorous, brave
(Case Casie)

Cassius
Latin: vain
(Cash, Chass, Cassie, Cassy, Cax, Cazzy, Caster)

Cedric
Old English: chief
(Ced, Rick, Rickie, Ricky)

Chad
Celtic: warrior
(Chadie, Chadd, Chaddie, Chaddy)

Chaim
Hebrew: to life
(Hy, Hyman, Hymie, Manny)

Chalmers
Teutonic: lord of the manor

Champ
Middle English: gladiator
(Champion)

Chandler
French: candlemaker, or seller of candles
(Chan, Chandlor)

Chanina
Yiddish: God is gracious

Charles
Anglo-Saxon: manly
(Carey, Cary, Carl, Carrol, Carroll, Karl, Carlo, Carlos, Charlemagne, Charley, Charlie, Charis, Charlton, Charleston, Chas, Chick, Chicky, Chuck)

Chase
Old French: hunter
(Chais)

Chauncey
Latin: from chancellor, meaning a church official
(Chance)

Chen
Chinese: great

Christian
Latin: a Christian
(Chris, Kit, Khris, Kris, Kristian)

Christopher
Greek: Christ-bearer
(Chris, Christofer, Christophe, Christy, Kit, Kris, Kristopher, Kristofer, Kristos, Kristy)

Cicero
Latin: orator, or guide
(Ciro)

Clarence
Latin: famous, or bright and clear
(Clair, Clere)

Clark
Latin: learned, or scholar
(Clarke, Clerc)

Claude
Latin: lame
(Chaudian, Claudio, Claus, Claudius)

Clay
Old English: of the earth

Clayton
Old English: the clay farm

Clemens
Latin: merciful
(Clem, Clement)

Cleveland
Old English: land from the steep bank
(Cleve)

Clifford
Anglo-Saxon: the ford near the cliff
(Clif, Cliff)

Clifton
Anglo-Saxon: the farm at the cliff
(Cliff, Cliffy, Cliffie)

Clinton
Anglo-Saxon: the farm at the hilltop
(Clint)

Clovis
Anglo-Saxon: clover
(Lewis)

Clyde
Welsh: warm

Colby
Old English: coal miner
(Coleman)

Colin
Celtic: child, or strong or virile
(Cailean, Colan, cole, Collin)

Collier
Old English: miner
(Collyer)

Colton
Old English: coal town

Compton
Old English: valley town

Conan
Old English: intelligent
(Con, Conant, Conen, Conn,Conney)

Conlan
Anglo-Saxon: hero
(Con, Connie)

Conrad
Teutonic: honest counselor
(Con, Conn, Conny, Connie, Cort, Curt, Knorad, Kurt)

Corbin
Latin: a raven
(Corbet, Corbett, Corby, Corwin)

Cordell
Old French: ropemaker
(Cord, Cordie, Cory, Corey)

Cory
Scottish: mountain glen or ravine
(Corey)

Cosmo
Greek: world, or well-ordered
(Cos, Cosimo)

Courtland
Anglo-Saxon: from the farms
(Court, Curt)

Courtney
Old French: of the court
(Cort, Court, Curt)

Craig
Celtic: crag or rocky hill
(Graig)

Crane
Old English: hoarse cry

Crockett
Brittish: a hill
(Crocker)

Curtis
Old French: courteous
(Curt, Curty, Kurt, Kurtis)

Cutler
Old English: knifemaker
(Cutty)

Cyrus
Persian: sun
(Ciro, Cy, Russ)