Troy, New York 1877 City Directory - O
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| Page # | Description / Surnames in order they appear, not necessarily in alphabetical order |
| Page 130 | O'Brien |
| Page 131 | O'Brien, O'Bryan, O'Callaghan, O'Cavanaugh, O'Connell, O'Conner, O'Conners, O'Connor, O'Day, O'Dea, O'Dell, O'Donnell |
| Page 132 | O'Donnell, O'Dowd, O'Farrell, O'Gorman, O'Haire, O'Hairn, O'Hara, O'Hare, O'Hearn, O'Hern, O'Keefe, O'Laughlin, O'Leary, O'Loughlin, O'Malley, O'Mara, O'Melia, O'Neal, O'Neil, O'Neill, O'Reilly, O'Shea, O'Sullivan |
| Page 133 | O'Sullivan, O'Toole, Oakley, Oakman, Oathout, Ochsner, Ochus, Odell, Ogden, Ohlhauser, Olena, Olens, Olien, Olinger, Oliver, Olmstead, Olsaver, Oppenheimer, Organ, Ormsby, Orr, Osborn, Osgood, Osterhoudt, Osterhout, Ostral, Ostrander, Ostrom, Otis, Otridge, Ott, Ottenhues, Otterson, Ottin, Otto, Oubey |
| Page 134 | Ouderkirk, Overright, Owen, Owens |
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