- Neil Cleary to George Cleave
- James Cleave to Darrell Cleaver
- David Cleaver to Shannon Cleaver
- Sharon Cleaver to Chanterra Clebourn
- Martin Clebowicz to Ronald Cleek
- Russell Cleek to Cory Clegg
- Courtney Clegg to Marjorie Clegg
- Mark Clegg to Douglas Cleghorn
- Dustin Cleghorn to Dorothy Cleland
- Douglas Cleland to Vicky Cleland
- Victoria Cleland to Bonnie Clem
- Brad Clem to Juanita Clem
- Judith Clem to Tommy Clem
- Toni Clem to Alexander Clemens
- Alexis Clemens to Erin Clemens
- Ernest Clemens to Lucille Clemens
- Lucy Clemens to Vivian Clemens
- Vonda Clemens to Celeste Clement
- Celia Clement to Glen Clement
- Glenda Clement to Lindsey Clement
- Linus Clement to Roslyn Clement
- Ross Clement to Aurora Clemente
- Barbara Clemente to Joan Clemente
- Joann Clemente to Samantha Clemente
- Samuel Clemente to Antoinette Clements
- Antonio Clements to Danielle Clements
- Danny Clements to Harriet Clements
- Harry Clements to Lana Clements
- Lance Clements to Odessa Clements
- Olga Clements to Thad Clements
- Thelma Clements to Mary Clemmens
- Matthew Clemmens to Marvin Clemmer
- Mary Clemmer to Courtney Clemmons
- Craig Clemmons to Lora Clemmons
- Loretta Clemmons to Wayne Clemmons
- Wendy Clemmons to Carroll Clemons
- Cary Clemons to Ethan Clemons
- Ethel Clemons to Kellie Clemons
- Kelly Clemons to Nell Clemons
- Nellie Clemons to Tammie Clemons
- Tammy Clemons to Jack Clendenen
- James Clendenen to Raymond Clendenin
- Rebecca Clendenin to Robert Clendon
- Ronald Clendon to Joseph Clerici
- Mauro Clerici to Michael Clery
- Michelle Clery to Brenda Cleveland
- Brennan Cleveland to Eddie Cleveland
- Edgar Cleveland to Jillian Cleveland
- Jim Cleveland to Marcia Cleveland
- Marcie Cleveland to Rosanne Cleveland
- Rose Cleveland to Zachary Cleveland
- Zack Cleveland to Derrick Clevenger
- Devin Clevenger to Leanna Clevenger
- Lee Clevenger to Terry Clevenger
- Thelma Clevenger to Larry Cleverly
- Mark Cleverly to Jennifer Clewis
- Jerry Clewis to Brian Click
- Brittany Click to Lloyd Click
- Lois Click to David Cliett
- Dennis Cliett to Sarah Cliff
- Scott Cliff to Claire Clifford
- Clara Clifford to Jamie Clifford
- Jan Clifford to Melissa Clifford
- Melody Clifford to Vanessa Clifford
- Velma Clifford to John Clift
- Johnny Clift to Barry Clifton
- Beatrice Clifton to Dwight Clifton
- Dylan Clifton to Jon Clifton
- Jonathan Clifton to Muriel Clifton
- Myra Clifton to Tonia Clifton
- Tony Clifton to Mark Climer
- Martha Climer to Sarah Clinard
- Scott Clinard to Beau Cline
- Becky Cline to Danielle Cline
- Danita Cline to Grady Cline
- Grant Cline to Kelli Cline
- Kellie Cline to Miles Cline
- Milford Cline to Shari Cline
- Sharon Cline to James Clinefelter
- Robert Clinefelter to Nathan Clingan
- Nicole Clingan to Karen Clinger
- Karl Clinger to Stephen Clingman
- Steve Clingman to Alton Clinkscales
- Amanda Clinkscales to Amber Clinton
- Amy Clinton to Elaine Clinton
- Eldon Clinton to La Clinton
- Lacey Clinton to Rose Clinton
- Rosemary Clinton to Dawn Clipper
- Deborah Clipper to John Clithero
- Paul Clithero to Candice Clodfelter
- Carl Clodfelter to Raymond Cloen
- John Cloepfil to Deborah Cloke
- Donald Cloke to Eugene Cloninger
- Eva Cloninger to Alan Clontz
- Allen Clontz to Christopher Cloonan
- Daniel Cloonan to Jacob Clopton
- Jacqueline Clopton to Marie Clore
- Marilyn Clore to David Close
- Dawn Close to Lori Close
- Lorraine Close to Angela Closner
- David Closner to Harold Closson
- Harry Closson to Jose Clotter
- Juana Clotter to Darren Cloud
- Darryl Cloud to Jolene Cloud
- Jon Cloud to Paulette Cloud
- Pauline Cloud to James Cloudman
- John Cloudman to Helen Clough
- Henry Clough to Rosalie Clough
- Rose Clough to Brenda Clouse
- Brent Clouse to Joyce Clouse
- Juanita Clouse to Tommy Clouse
- Toni Clouse to Pauline Clouser
- Peggy Clouser to Derek Cloutier
- Diana Cloutier to Omer Cloutier
- Pamela Cloutier to Gregory Clover
- Harold Clover to Christine Clow
- Christopher Clow to Helen Cloward
- Jack Cloward to Leonard Clower
- Lewis Clower to Martha Clowers
- Mary Clowers to Beth Cloyd
- Betty Cloyd to Sarah Cloyd
- Scott Cloyd to Lee Clubb
- Leslie Clubb to Jimmy Cluck
- Joe Cluck to Heather Cluff
- Heidi Cluff to Donald Clukey
- Donna Clukey to Jonathan Clune
- Joseph Clune to Patrick Clure
- Richard Clure to Thomas Clute
- Tiffany Clute to Ruth Clutter
- Ryan Clutter to Caroline Clyburn
- Carolyn Clyburn to Andrea Clyde
- Andrew Clyde to Robert Clyde
- Robin Clyde to Jordan Clymer
- Joseph Clymer to Martin Clyne
- Mary Clyne to Long Co
- Maria Co to Dolores Coad
- Don Coad to Richard Coady
- Rita Coady to Jack Coakley
- Jackie Coakley to Veronica Coakley
- Victoria Coakley to Annette Coan
- Anthony Coan to William Coan
- Zachary Coan to Alexandria Coates
- Alexis Coates to Debbie Coates
- Deborah Coates to Jarrod Coates
- Jasmine Coates to Maria Coates
- Marian Coates to Stacey Coates
- Stacie Coates to Nancy Coatney
- Pamela Coatney to Darin Coats
- Darlene Coats to Josh Coats
- Joshua Coats to Peter Coats
- Phil Coats to Dorothy Coaxum
- Edward Coaxum to Gary Cobaugh
- George Cobaugh to Brent Cobb
- Bret Cobb to Darrel Cobb
- Darrell Cobb to Floyd Cobb
- Forest Cobb to Jennie Cobb
- Jennifer Cobb to Laurie Cobb
- Lavern Cobb to Mikel Cobb
- Mildred Cobb to Rose Cobb
- Rosemarie Cobb to Tonja Cobb
- Tony Cobb to Jeremy Cobbins
- Jesse Cobbins to Anissa Cobbs
- Anita Cobbs to Jimmie Cobbs
- Jimmy Cobbs to Tanya Cobbs
- Tara Cobbs to Ruth Coberly
- Ryan Coberly to Ernesto Cobian
- Esteban Cobian to Annie Coble
- Anthony Coble to James Coble
- Jamie Coble to Roberta Coble
- Robin Coble to James Coblentz
- Jamie Coblentz to Christian Cobo
- Christina Cobo to Isabel Cobos
- Isidro Cobos to Amber Coburn
- Amy Coburn to Eugene Coburn
- Eula Coburn to Lyle Coburn
- Lynda Coburn to Tom Coburn
- Tommy Coburn to Marta Coca
- Mary Coca to Joseph Cocci
- Michael Cocci to Rita Cocco
- Robert Cocco to Albert Cochran
- Alberta Cochran to Chandler Cochran
- Charity Cochran to Ed Cochran
- Eddie Cochran to Jammie Cochran
- Jan Cochran to Laurel Cochran
- Lauren Cochran to Molly Cochran
- Mona Cochran to Saundra Cochran
- Savannah Cochran to Wilbur Cochran
- Wilburn Cochran to Frank Cochrane
- Frazier Cochrane to Rachel Cochrane
- Ralph Cochrane to Matthew Cockburn
- Melissa Cockburn to Bobby Cockerham
- Bonnie Cockerham to Melissa Cockerham
- Mervin Cockerham to Mary Cockerton
- James Cockerum to Steven Cockman
- Susan Cockman to Ella Cockrell
- Ellen Cockrell to Marsha Cockrell
- Marshall Cockrell to Catherine Cockrill
- Charles Cockrill to Lisa Cockrum
- Lora Cockrum to Gerald Coco
- Gerard Coco to Mary Cocozza
- Michael Cocozza to Robert Coddens
- Andrew Codding to Lisa Coddington
- Lois Coddington to Douglas Coder
- Dustin Coder to Linda Codiga
- John Codignotto to Michael Coduti
- Robert Coduti to Deloris Cody
- Demetrius Cody to Jordan Cody
- Joseph Cody to Patrice Cody
- Patricia Cody to Aimee Coe
- Al Coe to Doreen Coe
- Doris Coe to Kent Coe
- Keri Coe to Ron Coe
- Ronald Coe to Breno Coelho
- Brian Coelho to Megan Coelho
- Melissa Coelho to Melissa Coello
- Mercedes Coello to Joel Coen