| Surname | Data | Member # |
| LABONTE | Keeseville, NY; Canada | M518 |
| LAFLIN | Saugerties, Ulster Co., NY; Frontier, Clinton Co., NY | K143 |
| LAIGHT / LYGHT / LAIGHTY | New Windsor, NY; Andes, Delaware Co., NY; Monroe Co., NY; Windsor, Ontario | B175 |
| LALONDE / LALONE | Carthage, NY | P221 |
| LANDON | Columbia Co., NY; Johnstown, NY | G229 |
| LANE | CT; Oswego Co., NY | R213 |
| LANE/MCLANE | Cayuga Co., NY; Van Buren Co., MI | J121 |
| LANG | Belfast, Allegany Co., NY; Machias, NY; Wyoming Co., NY | B545 |
| LANGDON | Wyoming Co., NY; Fryeburg, ME; Boston, MA | L45 |
| LANGDON | CT; NY; MI | M523 |
| LAPLANTE | Erie Co., NY; Canada | M505 |
| LAW | Broome Co., NY | V059 |
| LAW | Canada; Russell & Pierrepont, St. Lawrence Co., NY | L181 |
| LAWRENCE | New York City, NY; Wayne Co., NY | R275 |
| LAYMAN | Jefferson Co., NY | W373 |
| LEARNED | MA; VT; NY | M456 |
| LEE | Saratoga Co., NY | H412 |
| LEE | Allegany, NY | B431 |
| LEE | Skaneateles & Marcellus, NY | W224 |
| LEET | Stony Point, Rockland Co., NY | E097 |
| LEET | CT; Stony Point, Rockland Co., NY | N097 |
| LEIBFRIED | Germany; New York City; Syracuse, NY | S541 |
| LENWAY | Carthage, NY | P221 |
| LEWIS | CT; NY; MI | M523 |
| LIGHT (+var) | NY; PA VA; CA; WA; NM | B175 |
| LIGHT / LEIGHT / LAIGHT (+var) | Rochester, Afton, Tioga, Mayfield and Rochester, NY | B175 |
| LIGHT / LYTE / LEIGHT / LIGHTE / LICHT / LYGHT / LAIGHT / LEITE | Tioga, Delaware, Tompkins, Chemung, Broome, Schoharie, Ulster, Onondaga, Genesee, Chenango, Green Monroe, Otsego & Ontario Co., NY | B175 |
| LILLIE | St. Lawrence Co., NY | B548 |
| LINDENBOWER /LINDENBAUER | Montgomery City, NY; Greene Co., MO, Lenawee City, MI; Marion City, IN, Dakota Territory | T178 |
| LITTLEFAIR | Otsego & Chenango Co., NY | V059 |
| LITTLEFIELD | Verona, Oneida Co., NY; Rensselaer Co., NY | C465 |
| LOBDEL | Cattaraugus Co., NY | C409 |
| LONG | St. Lawrence Co., NY | B548 |
| LORY | CT; Hyndsville, Schoharie Co., NY; Tioga Co., NY | D256 |
| LORY | Apalachin, NY; Poughkeepsie, NY | D256 |
| LOSS | Madison, Onondaga, Monroe & Oneida Co., NY | L226 |
| LURCOCK | NY (Southern Tier); PA (Northern) | D257 |
| MACMILLAN | Oswego Co., NY; Ontario, Canada; | C409 |
| MAHAN | Ireland; Cleveland & Fulton, NY | B461 |
| MAILLOUX | NY; MA; VT | S597 |
| MANN | Columbia & Brome Co., NY; Scotland | R275 |
| MANNING | NY; NJ; OH | H341 |
| MARCY | Utica & Albany, NY | B260 |
| MARKHAM | MA; CT; NY; MI; WI; OR; WA | H388 |
| MARSDEN | Oneida & Oswego Co., NY | M505 |
| MARSH | Nova Scotia | B197 |
| MARSHALL | Oswego & St. Lawrence Co., NY | C459 |
| MARTIN | Ausable & Keeseville, NY; Canada | M518 |
| MARVIN | Oneida & Oswego Co., NY; CT | W209 |
| MASON | Schroon, Essex Co., NY | D146 |
| MASONHEIMER | Allegheny Co., PA | P270 |
| MATHER | Newfane & Niagara, NY | E110 |
| MATHER | Sempronius, Cayuga Co., NY; Addison, Stuben Co., NY | M514 |
| MATTISON/MATTESON | W. Greenwich, RI; Shaftsbury, VT; Town Albion, Oswego Co., NY | B462 |
| MAXSON | Brookfield, NY; Berlin, NY; Westerly, RI | N-110 |
| MAYNE | St. Lawrence Co., NY | Y030 |
| MCCARTHY | North Lawrence, NY | P221 |
| MCCONNELL | Ontario & Onondaga Co., NY | M510 |
| MCDERMOTT | Ireland; Salem, NY | K145 |
| MCDONALD | Fulton Co., NY | C462 |
| MCDONALD | Cooperstown area / Otsego County, NY | G282 |
| MCDONALD | Little Falls, Herkimer Co; NY | G282 |
| MCGINN | Oswego, NY | E111 |
| McHALE | Co. Mayo, Ireland; Highmarket, Lewis Co., NY; IA | C365 |
| MCHUGO | Madison Co., NY | B574 |
| MCLANE/LANE | Cayuga Co., NY; Van Buren Co., MI | J121 |
| MCMULLEN | Otsego, Schoharie & Delaware Co., NY | F205 |
| MCNEIL | NY; Ionia Co., MI; Beverly, Canada | C462 |
| MCNEILL | Co. Antrim, Ireland; Glace Bay, Nova Scotia; Onondaga Co., NY | J127 |
| MCNERNEY | Buffalo, Erie Co., NY | W429 |
| MCWILLIAMS | Delaware Co., NY | F205 |
| MEACHAM | Richland & Sandy Pond, Oswego Co., NY; Madison Co., IL | K187 |
| MEEK | Allegany, Cayuga, Schoharie & Tompkins Co., NY (1800's) | B563 |
| MERTZ / MARTZ | Lehigh & Northampton Co., PA; Seneca Co., NY | T153 |
| MILLARD | CT; Otsego Co., NY; Palermo, NY | B449 |
| MILLER | Tioga, Delaware, Tompkins, Chemung, Broome, Schoharie, Ulster, Onondaga, Genesee, Chenango, Green Monroe, Otsego & Ontario Co., NY | B175 |
| MILLIGAN | NY | M456 |
| MILLS | Floversville & Johnstown, Fulton Co., NY, Oneida Co., NY | D257 |
| MILLS | Windsor, CT; Netherlands | D257 |
| MILLS, James | Cortlandville, Cortland Co., NY | T159 |
| MINER | Guilford, CT; Brookfield & Hamilton, Madison Co., NY | B512 |
| MISIK | Hungary; Hoboken & Secaucus, NJ | C415 |
| MITCHELL | Ireland; Towanda, PA; Broome Co., NY | J042 |
| MOFFATT | NY | H341 |
| MOFFETT | NJ | H416 |
| MOONEY | Woodstock, Ulster Co., NY: Town of Galen, Wayne Co., NY | K158 |
| MOORHEAD / MOREHEAD / MOOREHEAD | Broome & Chenango Co., NY | M508 |
| MORGAN | Oswego Co., NY | C409 |
| MORISSETTE | France; Quebec, Canada | J135 |
| MORRIS | NY | H341 |
| MORTON | Richford, Tioga Co., NY; Harford, Cortland Co., NY; Auburn, Cayuga Co., NY | M514 |
| MOSHER | Washington, Saratoga, Dutchess & Otsego Co., NY | C384 |
| MOSS | CT; Oswego Co., NY | Y030 |
| MOYER | Baldwinsville & Clay, Onondaga Co., NY; Herkimer Co., NY; Minden, Montgomery Co., NY | D256 |
| MOYER | Montgomery Co., NY; Baldwinsville & Clay, Onondaga Co., NY | D256 |
| MULLEEN | Syracuse, NY; Ireland | F218 |
| MULLEN | North Lawrence, NY | P221 |
| MULLINNEX | Delaware Co. & Westchester Co., NY | F225 |
| MURPHY / MURPHEY | Otsego & Broome Co., NY | R275 |
| MURRAY | New Scotland, Albany Co.; Onondaga Co., NY | W396 |
| MYERS | Germany; Montgomery Co., NY | G141 |
| NASH | Oswego Co., NY | R299 |
| NEAL | Erie & Tioga Co., NY | P292 |
| NEWBERRY | Oneida & Jefferson Co., NY | B570 |
| NEWLAND | Cayuga & Saratoga Co., NY; MA | E107 |
| NEWMAN | Ocean Grove, NJ; Cold Spring Harbor, Long Island, NY | N097 |
| NICHOLS | N. Wales; Utica, NY | B405 |
| NILES | Hampshire Co., MA; Chenango & Madison Co., NY | C372 |
| NILES, E. | Stuben, NY | F222 |
| NORTH | Onondaga & Oneida Co., NY; England | H416 |
| NORTH | Syracuse, Onondaga Co., NY | W373 |
| NORTON | Rutland, Rutland Co., VT; E. Bloomfield, Ontario Co., NY; Parma, Cuyahoga Co., OH | S526 |
| NUTTING | MA; Otsego Co., NY; Parish, NY | B449 |
| OAKLEY | Orange Co., NY | E107 |
| O'BRIEN | Co. Cork, Ireland; Little Falls, NY | J127 |
| O'CONNOR | Long Pt. & Gananoque, Ontario; Jefferson Co., NY | B462 |
| O'CONNOR | Ireland; Canton, St. Lawrence Co., NY | K184 |
| OLCOTT | Syracuse & Pompey, Onondaga Co., NY | W373 |
| OLDER | Delaware, Onondaga & Cattaraugus Co., NY | H398 |
| OLSEN | Denmark; Perth Amboy, NJ; Rome, Oneida Co, NY | H394 |
| ORENDORF | Herkimer Co., NY | C464 |
| ORR / HORR | Phoenix, Town Schroeppel, Oswego Co., NY; Little Falls, Herkimer Co., NY | D256 |
| ORVIS | Jefferson & Oswego Co., NY | M505 |
| OSMER, Ephraini B & Dehliah | Gainesville, Wyoming Co, NY; Argyle, Washington Co., NY | S600 |
| OSMUN | NY; OH | H341 |
| OSTRANDER | Coxsackie, Greene Co., NY; Otsego Co., NY; Monroe Co., MI | C462 |
| OSTRANDER | Greene & Columbia Co., NY | W297 |
| OSWALD | Onondaga Co., NY | R270 |
| OTIS | NH; Franklin Co., VT; Franklin Co., NY | W395 |
| PANGBURN / PANGBORN | Tompkins Co., NY (1800's) | B563 |
| PANGBURN | Albany Co., NY | E103 |
| PARISH | Cattagarus & Onondaga Co., NY | C409 |
| PARKER | Wayne & Cayuga Co., NY | H335 |
| PARKER | Henrietta, Monroe Co., NY | B512 |
| PARKER | Varysburg & Sheldon, Wyoming Co., NY | B545 |
| PARMITER | Oswego Co., NY | C459 |
| PARRISH | Ontario Co., NY | L226 |
| PARSONS | Greene, Madison & Oneida Co., NY | L226 |
| PARSONS / PERSONS | Beaminster, Dorset, England; Springfield, MA.; Enfield, Hartford Co., CT; Somers, Tolland Co., CT; Homer Twp., Cortland Co., NY | S534 |
| PATCHEN | Wayne, Cayuga, Chenango & Warren Co., NY | M521 |
| PATENAUDE | Keeseville, NY; Vermont; Canada | M518 |
| PATTEN | Saratoga & Albany Co., NY | J148 |
| PAYN | Columbia Co., NY; Granby, Oswego & Hinmansville, NY | D256 |
| PAYNE | Columbia Co., Hinmansville, NY | D256 |
| PAYNE-DAVIS | Herkimer Co., NY; Hinmansville & Oswego, NY | D256 |
| PEARSON | Cayuga & Onondaga Co., NY | M521 |
| PEKINS | Smyrna & Granville, NY | K145 |
| PENDELL | Chenango & Wayne Co., NY | V059 |
| PERKINS | Madison, Chenango & Stuben Co., NY | H398 |
| PETTIT | Catskill, NY; Columbia & Otsego Co., NY | C384 |
| PETTIT | Montgomery Co., NY | E110 |
| PFLUKE | Rome, NY | T170 |
| PHILLEY | Sanford, Broome Co., NY | B569 |
| PHILLEY, Alanson | Sanford, Broome Co., NY | B569 |
| PICKNEY | Tioga, Delaware, Tompkins, Chemung, Broome, Schoharie, Ulster, Onondaga, Genesee, Chenango, Green Monroe, Otsego & Ontario Co., NY | B175 |
| PIERCE / PIERCY | Tioga, Delaware, Tompkins, Chemung, Broome, Schoharie, Ulster, Onondaga, Genesee, Chenango, Green Monroe, Otsego & Ontario Co., NY | B175 |
| PIERCE | Cortland Co., NY | J121 |
| PIKE | Washington Co., NY | R247 |
| PILOTE | France; Quebec, Canada | J135 |
| POMEROY | Oneida, Wayne & Onondaga Co., NY | P270 |
| POOLER | Onondaga, Cayuga & Oswego Co., NY | B474 |
| PORTER | Wayne Co., NY | W395 |
| POTOCKI | Utica & Rome, NY; Oneida Co., NY | H394 |
| POTTER | Oswego & Albany Co., NY | H203 |
| POTTER | Oneida Co., NY | T170 |
| POTTER | Cortland Co., NY | J121 |
| POTTER | Coventry, England; Shawomet / Warwick, Providence Colony, RI; Portsmouth, Newport, RI; Scituate & Foster, Providence, RI; Winfield, Herkimer Co., NY; Cortland, Cortland Co, NY | S534 |
| POTTER | Chemung, Ontario & Seneca Co., NY | T153 |
| POWERS | Herkimer & Chenango Co., NY | V059 |
| PRATT | Otsego Co., NY | N106 |
| PRESTON | Dutchess Co., NY | M508 |
| PRINCE | Mexico, Oswego Co., NY | K143 |
| PRITCHARD | N. Wales; VT; Washington, Oneida, & Onondaga Co., NY | G257 |
| PROBASCO | Ontario Co., NY (1800's) | B563 |