There are 99 unique creditor surnames beginning with M:

Maberry	Mace	Madden	Maddox Brothers Company	Malin	Malone	Manchester
Manke and Mulenbruch	Mannon	Mansfield Buggy Company	Mansfield Material Fire Insurance Co.	Marion	Marion Brewery Company	Marion Manufacturing Company
Marion Supply and Oil Company	Marriott	Marsh	Marsh Dry Goods Company	Martin	Martin and Samler	Martin and Wynkoop
Marysville Lumber Company	Marysville Oil Products Company	Maskill	Mast	Mather	Maxton	Maxwell
McAulliffe	McAulliffe Brothers	McCampbell	McCloud	McConan	McCormick Harvesting Maching Company	McCoy
McCrea	McCrory	McCune	McCune and Withoff	McCune, Lonnis and Griswald	McCune, Withoff and Company	McFarline
McGlade	McGuffey	McIlroy	McIlvain and Harriott	McIntire	McKee	McKee, Woodard and Weakley
McKinley	McKinney	McKinniss	McKirgan Brothers	McKitrick	McLain	McMenis
Mead	Mechanicsburg Machine Company	Merchant	Merchants and Mechanics Bank, Columbus, OH	Meridith	Merkel Brothers	Merre
Miamisburg Twine and Cordage Company	Middlesworth	Miles	Miles and Bancroft	Miles, Bancroft and Sheldon	Milford Center Bank	Millar and Nagers
Miller	Miller and Dunham	Miller, Duborne and Peters Manufacturing Co.	Milligan	Mitchell	Moffett	Moffitt
Monahan	Monroe	Montgomery	Montgomery Company	Moore	Moore and Ross Company	Moorse
Morelock	Morey	Morgan Wright Company	Morgridge	Morris	Morrison	Morrow
Morse	Motor Oil Company	Mt. Victory Bank, Mt. Victory, OH	Mulford	Mulligan	Munday	Murphy
Myers Grain Company, Lockbourne, OH