- Opal Mack to Shaneka Mack
- Shani Mack to Tricia Mack
- Trina Mack to Alexander MacKay
- Alexandra MacKay to James MacKay
- Jamie MacKay to Sarah MacKay
- Scott MacKay to Sharon Macke
- Sheila Macke to Angus MacKenzie
- Anita MacKenzie to Ida MacKenzie
- Inez MacKenzie to Patrick MacKenzie
- Patsy MacKenzie to John Mackes
- Kenneth Mackes to Christine Mackey
- Christoph Mackey to George Mackey
- Georgia Mackey to Lakeisha Mackey
- Lakesha Mackey to Otto Mackey
- Paige Mackey to Trevor Mackey
- Tricia Mackey to Gayle Mackie
- George Mackie to Stephen Mackie
- Steve Mackie to Craig Mackin
- Crystal Mackin to Jeremy Mackinder
- John Mackinder to Maria MacKinnon
- Marie MacKinnon to Brian Mackle
- Daniel Mackle to Carol Macklin
- Carole Macklin to Larry Macklin
- Laura Macklin to George Macknight
- Heather Macknight to Megan Mackowiak
- Melissa Mackowiak to Nancy Maclaine
- William Maclaine to Alvin MacLean
- Alyssa MacLean to Lesley MacLean
- Leslie MacLean to Joan MacLellan
- John MacLellan to Carolyn MacLeod
- Carrie MacLeod to Maria MacLeod
- Marian MacLeod to Ebony Maclin
- Eddie Maclin to Thomas Macmanus
- William Macmanus to Harold MacMillan
- Harriet MacMillan to Robert Macmillian
- William Macmillian to Robert Macnamara
- Ryan Macnamara to Julie MacNeil
- June MacNeil to Edward Macnew
- James Macnew to Kevin MacOmber
- Kim MacOmber to David MacOn
- Dawn MacOn to Mickele MacOn
- Mike MacOn to Duncan MacPhail
- Elizabeth MacPhail to Drew MacPherson
- Dunc MacPherson to Steven MacPherson
- Stuart MacPherson to Evelyn Macrae
- Frank Macrae to Joann Macri
- Joe Macri to Robert MacTaggart
- Scott MacTaggart to Robert Macwithey
- Thomas Macwright to Maria Macy
- Marie Macy to Paul Madafferi
- Peter Madafferi to Lawrence Madara
- Linda Madara to Stanley Maday
- Stephen Maday to Antoinette Madden
- Antonio Madden to Dennis Madden
- Denver Madden to Jeannie Madden
- Jeannine Madden to Marilyn Madden
- Marion Madden to Shayla Madden
- Sheena Madden to Ashley Madding
- Barbara Madding to Jessica Maddock
- Joan Maddock to Allison Maddox
- Alma Maddox to Connie Maddox
- Constance Maddox to Glen Maddox
- Glenda Maddox to Kimberley Maddox
- Kimberly Maddox to Neal Maddox
- Ned Maddox to Suzanna Maddox
- Suzanne Maddox to Carol Maddux
- Carole Maddux to Rodney Maddux
- Roger Maddux to Gladys Madeira
- Grace Madeira to Lisa Maden
- Mark Maden to Kathryn Mader
- Kathy Mader to Bertha Madera
- Blanca Madera to Lisa Madera
- Lissette Madera to Donna Madere
- Dorothy Madere to Ronald Maderos
- William Maderos to Colleen Madia
- Daniel Madia to Kelly Madigan
- Kenneth Madigan to James Madine
- John Madine to Christian Madison
- Christie Madison to Gayle Madison
- Gene Madison to Lara Madison
- Larry Madison to Olin Madison
- Oliver Madison to Toby Madison
- Todd Madison to Collester Madlock
- Cynthia Madlock to Angelo Madonis
- John Madonis to Jeffrey Madore
- Jennifer Madore to Abelino Madrid
- Abigail Madrid to Daniel Madrid
- Daniela Madrid to Israel Madrid
- Issac Madrid to Martha Madrid
- Martin Madrid to Sandy Madrid
- Santiago Madrid to Arturo Madrigal
- Ashley Madrigal to Faviola Madrigal
- Federico Madrigal to Louise Madrigal
- Lourdes Madrigal to Sally Madrigal
- Salomon Madrigal to Fidelia Madriz
- Francisco Madriz to Adam Madsen
- Adrian Madsen to Edith Madsen
- Edna Madsen to Lacy Madsen
- Lance Madsen to Sarah Madsen
- Scott Madsen to Jason Madson
- Jean Madson to Judith Madura
- Julie Madura to Patricia Mae
- Paula Mae to Yuki Maeda
- Yukiko Maeda to William Maertens
- Albert Maertz to Gloria Maes
- Grace Maes to Tamara Maes
- Tammy Maes to Bridget Maestas
- Brittany Maestas to Leonard Maestas
- Leopoldo Maestas to Andrew Maestre
- Angel Maestre to Patricia Maez
- Patrick Maez to Debra Maffeo
- Donna Maffeo to Malia Mafi
- Mele Mafi to Dora Magallan
- Elizabeth Magallan to Jesse Magallanes
- Jessica Magallanes to Carlos Magallanez
- Carmen Magallanez to Marina Magallon
- Mario Magallon to Antonio Magana
- Apolinar Magana to Emily Magana
- Emma Magana to Juana Magana
- Juanita Magana to Pamela Magana
- Paola Magana to Yvette Magana
- Yvonne Magana to Patricia Magas
- Mamadou Magassouba to Martha Magdalena
- Mary Magdalene to Laura Magdaleno
- Leandra Magdaleno to Alberta Magee
- Alex Magee to Dana Magee
- Dani Magee to Ingrid Magee
- Irene Magee to Louise Magee
- Lucas Magee to Ronnie Magee
- Roosevelt Magee to Nicholas Magel
- Patricia Magel to Martin Mager
- Marvin Mager to Karen Magers
- Kathleen Magers to Carlos Maggard
- Carol Maggard to Lonnie Maggard
- Lore Maggard to Richard Maggart
- Robert Maggart to Antonio Maggio
- April Maggio to Nicholas Maggio
- Nick Maggio to Darla Maggs
- David Maggs to Sherry Magiera
- Stanley Magiera to Kevin Magill
- Kimberly Magill to David Maginity
- Kevin Maginity to Mark Magliano
- Mary Magliano to Peter Magliocco
- Richard Magliocco to Jeff Magnan
- Jeffrey Magnan to Arley Magner
- Arthur Magner to Catherine Magness
- Chad Magness to Mark Magney
- Patricia Magney to Louis Magnon
- Mary Magnon to Laura Magnus
- Lauren Magnus to Einar Magnuson
- Elaine Magnuson to Natasha Magnuson
- Nathan Magnuson to Donald Magnusson
- Dorothy Magnusson to Joan Magoon
- John Magoon to Jennifer Magrath
- John Magrath to John Magrosky
- Thomas Magrosky to Terry Magruder
- Theresa Magruder to Claire Maguire
- Clara Maguire to Keith Maguire
- Kelley Maguire to Teresa Maguire
- Teri Maguire to Jane Magyar
- Janos Magyar to Peter Mah
- Phillip Mah to Carrie Mahaffey
- Catherine Mahaffey to Kristy Mahaffey
- Kyle Mahaffey to Wm Mahaffey
- Yvonne Mahaffey to Mary Mahala
- Michael Mahala to Chris Mahan
- Christie Mahan to Jewel Mahan
- Jill Mahan to Phillip Mahan
- Phyllis Mahan to Barbara Mahaney
- Betty Mahaney to Sarika Mahant
- Alice Mahany to Stephen Mahar
- Steve Mahar to Suraj Maharjan
- Surendra Maharjan to Barbara Maher
- Barry Maher to Glenn Maher
- Gloria Maher to Maryellen Maher
- Mason Maher to Virgina Maher
- Virginia Maher to George Mahieu
- James Mahieu to Anne Mahler
- Annette Mahler to Marion Mahler
- Marjorie Mahler to Kimberly Mahlum
- Larry Mahlum to Saira Mahmood
- Sajid Mahmood to Samira Mahmoud
- Sana Mahmoud to Ann Mahnke
- Anthony Mahnke to William Mahomes
- Mahmoud Mahomoud to Heidi Mahon
- Helen Mahon to Robin Mahon
- Rocky Mahon to Henry Mahone
- Ida Mahone to Andrew Mahoney
- Angel Mahoney to Derek Mahoney
- Derrick Mahoney to Jillian Mahoney
- Jim Mahoney to Maryjane Mahoney
- Mathew Mahoney to Stevie Mahoney
- Stuart Mahoney to Paul Mahony
- Peggy Mahony to Jeff Mahr
- Jeffrey Mahr to Laura Mahurin
- Leslie Mahurin to Erin Mai
- Fang Mai to Monique Mai
- Mu Mai to Vang Mai
- Vanna Mai to Anthony Maida
- Antoinette Maida to Dorothy Maiden
- Douglas Maiden to Ronald Maidens
- Thomas Maidens to Chelsea Maier
- Cheri Maier to Joanne Maier
- Jodi Maier to Roxanne Maier
- Roy Maier to Donna Maietta
- Filomena Maietta to Nicholas Maile
- Nicole Maile to Annette Maillet
- Anthony Maillet to Jacques Mailloux
- James Mailloux to Alberta Main
- Alex Main to Florence Main
- Floyd Main to Melanie Main
- Melinda Main to Edwin Maina
- Elizabeth Maina to Joseph Maine
- Joshua Maine to Andrea Maines
- Andrew Maines to Raymond Maines
- Rebecca Maines to Karen Mainor