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EVERY NAME INDEX TO 
A GENEALOGICAL AND BIOGRAPHICAL HISTORY
OF ALLEGHENY COUNTY, PENNSYLVANIA

Compiled by Cathy L. O'Connor, © 2010.  

Excerpted from Part II of History of Allegheny County, Pennsylvania, 
edited by Dr. Thomas Cushing, et. al, Chicago 1889.  Reprinted
from a volume borrowed from the library of Floyd G. Hoenstine.
Publisher’s Note:  As the index references correspond to the page 
numbers of the parent work, the original page numbers have been 
retained.

Retitled and reprinted by Genealogical Publishing Co., Inc., 
Baltimore, 1975

This index contains over 42,700 entries.


SURNAMES – LETTER O


Oakley, 332
Obenauf, Christian, 750
Obenauf, Fraugott, 750 
Obenauf, Mr., 750
Obenauf, Mrs. Fraugott, 750 
Obenauf, Mrs. Magdalena (Morbach), 750
Obermarm, Jeanette, 388
Obey, James, 682
Obey, John, 387, 593
Obey, Lucy W., 525
Obey, Mary A., 682
Obey, Mary E., 682
Obey, Miss, 387
Obey, Mrs. (Trunick), 387
Obey, Mrs. James, 682
Obey, Mrs. John, 387, 593
Obey, Mrs. Mary A., 682
Obey, Mrs. Sarah (Benny), 593
Obey, Sarah, 593
Obney, Susanna, 748
O'Brien, Elenor, 665 
O'Bryon, Minnie, 360
O'Bryon, Mrs. Minnie (Van Kirk), 360
O'Bryon, Mrs. William, 360
O'Bryon, William, 360
Ochlman, Hannah, 756
Ochner, Amelia Porter, 474
Ochse, Charles D., 526
Ochse, Emma E., 526
Ochse, H. W., 526
Ochse, Henry W., 526
Ochse, Henry, 526
Ochse, John J., 526
Ochse, Julia D., 526
Ochse, Louise R., 526
Ochse, Maria, 526
Ochse, Mary F., 526
Ochse, Mr., 526
Ochse, Mrs. Henry W., 526
Ochse, Mrs. Henry, 526
Ochse, Mrs. Julia D. (Newmaster), 526
Ochse, Mrs. Maria (Sutter), 526
Ochse, Samuel J., 526
Ochse, Wilhelmine S., 526
O'Conner, Michael, 768
O'Conner, Rt. Rev. Michael, 768
O'Connor, 269
O'Connor, Caroline, 456
O'Connor, Catherine G., 456
O'Connor, Christian I., 456
O'Connor, Christiana, 456
O'Connor, Dr. H. R., 456
O'Connor, Dr., 456
O'Connor, H. R., 456
O'Connor, Harry R., 456
O'Connor, Hercules, 269 
O'Connor, Kinsley T., 456
O'Connor, Margaret, 456
O'Connor, Mary A., 456
O'Connor, Mrs. Christiana (Kinsley), 456
O'Connor, Mrs. Thomas, Jr., 456
O'Connor, Rt. Rev. Dr., 250
O'Connor, Thomas G., 456
O'Connor, Thomas, 456
O'Connor, Thomas, Jr., 456
O'Day, Daniel, 303
O'Day, Mr., 304
Odenheimer, Bishop, 239
Odenwelder, Charles, 665
Odenwelder, Kate, 665
Odenwelder, Mrs. Charles, 665
Odenwelder, Mrs. Kate (McGurk), 665
Odenwelder, Rose, 665
O'Donnell, Charles, 745
O'Donnell, Ellen, 305
O'Donnell, James, 305
O'Donnell, Mary, 305, 476
O'Donnell, Mrs. James, 305
O'Donnell, Mrs. Mary, 305
Oeffner, John F., 718
Oeffner, John G., 718
Oeffner, Mr., 718
Oesterley, Anna, 671
Oesterley, Freddie, 671
Oesterley, Genovefa, 671 *
Oesterley, Jacob, 671
Oesterley, Joseph, 671
Oesterley, Mary A., 671
Oesterley, Mary, 671
Oesterley, Mr. 671
Oesterley, Mrs. Jacob, 671
Oesterley, Mrs. Mary A. (Nicholson), 671
Oesterling, James W., 751
Oesterling, John, 751
Oesterling, Mr., 751
O'Hanlon, Anna, 511
O'Hanlon, Mrs. Anna (Gross), 511
O'Hanlon, Mrs., 511
O'Hara, 216
O'Hara, Col. James, 438, 772
O'Hara, Col., 268
O'Hara, Elizabeth F., 215
O'Hara, Gen. James, 215, 771, 774, 775
O'Hara, Gen., 774, 775
O'Hara, James, 215, 438, 771, 772, 774, 775
O'Hara, Jane, 406
O'Hara, Mary Ann, 268
O'Hara, Mary, 215, 775
O'Hara, Mr., 774
O'Hara, Mrs. James, 215
O'Hara, Mrs. Mary (Carson), 215
Oiler, Sarah J., 669
O'Keefe, Ellen, 476
O'Keefe, John, 476
O'Keefe, Kate, 476
O'Keefe, Maggie, 476
O'Keefe, Mary, 476
O'Keefe, Michael, 476
O'Keefe, Michael, Jr., 476
O'Keefe, Mr., 476
O'Keefe, Mrs. John, 476
O'Keefe, Mrs. Mary (Dillon), 476
O'Keefe, Mrs. Mary (O'Donnell), 476
O'Keefe, Mrs. Michael, 476
O'Keefe, Patrick, 476
Okely, Susan Ann, 343
Oldfield, Mary, 642
Oldham, Mary J., 358
Oldham, William, 358
Oldshoe, Dr., 420
O'Leary, Elizabeth, 545
Oliver, 238, 322
Oliver, Alice M., 737
Oliver, Amelia Elizabeth, 415
Oliver, Amelia, 508
Oliver, Charles, 415
Oliver, David, 464
Oliver, Dr. Seward, 737
Oliver, Dr., 737
Oliver, Eliza B., 464
Oliver, Elizabeth, 464
Oliver, H. W., Sr., 238
Oliver, Isabella, 448
Oliver, James B., 408
Oliver, John H., 464
Oliver, John L., 464
Oliver, Laura Bell, 737
Oliver, Lizzie (Nixon), 499
Oliver, Maggie B., 238
Oliver, Margaret, 238
Oliver, Mary E., 464
Oliver, Mary, 268
Oliver, Matilda, 464
Oliver, Mr., 464
Oliver, Mrs. Alice M. (Robinson), 737
Oliver, Mrs. Amelia (Shields), 508
Oliver, Mrs. Amelia Elizabeth (Cramer), 415
Oliver, Mrs. Charles, 415
Oliver, Mrs. Eliza B. (Huston), 464
Oliver, Mrs. H. W., Sr., 238
Oliver, Mrs. James B., 508
Oliver, Mrs. John H., 464
Oliver, Mrs. Margaret (Brown), 238
Oliver, Mrs. Matilda (Lenfestey), 464
Oliver, Mrs. William L. 464
Oliver, Rachel, 327
Oliver, Sarah, 443 
Oliver, Seward, 737
Oliver, William L., 464
Oliver, William, 448
Olmsted, Abby J., 505
Olmsted, Charles C., 505
Olmsted, Jennie M., 313
O'Neil, Alfred B., 404, 405
O'Neil, Anna, 325
O'Neil, Betty, 322
O'Neil, Caroline, 325
O'Neil, Catherine, 494
O'Neil, Charles, 325, 404
O'Neil, Charlie, 494
O'Neil, Clara, 494
O'Neil, Denny, 325, 404
O'Neil, Edward, 494
O'Neil, Eliza J., 325, 336
O'Neil, Eliza, 316
O'Neil, Elizabeth, 325, 494
O'Neil, Ella, 316, 325, 494
O'Neil, Fanny, 404
O'Neil, George, 494
O'Neil, Harriet R., 306
O'Neil, Harvey, 325
O'Neil, Hugh, 306
O'Neil, J. D., 404
O'Neil, J. N., 306
O'Neil, J. P., 760
O'Neil, James, 316, 325, 336, 494
O'Neil, John N., 306
O'Neil, John Nixon, 306
O'Neil, John, 325, 404, 494, 708
O'Neil, Margaret, 494
O'Neil, Martha, 307
O'Neil, Mary, 494, 549
O'Neil, Melissa J., 325
O'Neil, Mr., 580
O'Neil, Mrs. Alfred B., 404
O'Neil, Mrs. Denny, 404
O'Neil, Mrs. Edward, 494
O'Neil, Mrs. Eliza (Berry), 316
O'Neil, Mrs. Eliza J. (Berry), 325, 336
O'Neil, Mrs. Elizabeth (Miller), 494
O'Neil, Mrs. Fanny (Stephens), 404
O'Neil, Mrs. Harriet R. (Stevenson), 306
O'Neil, Mrs. J. N., 306
O'Neil, Mrs. James, 316, 325, 336, 494
O'Neil, Mrs. John Nixon, 306
O'Neil, Mrs. John, 325, 404, 494, 708
O'Neil, Mrs. Margaret (McGee), 494
O'Neil, Mrs. Martha (Fergus), 307
O'Neil, Mrs. Mary (Dulin), 494
O'Neil, Mrs. Nancy (McClure), 306
O'Neil, Mrs. Ruth A. (Patterson), 708
O'Neil, Mrs. Sarah (Brauff), 404
O'Neil, Mrs. Sarah (Robinson), 325, 404
O'Neil, Mrs. William D., 307
O'Neil, Nancy, 306
O'Neil, Polly, 325
O'Neil, Prof. J. P., 760
O'Neil, Ruth A., 708
O'Neil, Samuel, 325
O'Neil, Sarah, 325, 404
O'Neil, Thomas, 494
O'Neil, W. W., 306, 590
O'Neil, William D., 306
O'Neil, Willie, 494
O'Neill, Barbara, 653
O'Neill, Daniel, 767
O'Neill, Eugene M., 767
O'Neill, Mary, 653
O'Neill, Michael, 653
O'Neill, Mr., 767
O'Neill, Mrs. (Brauff), 380
O'Neill, Mrs. Barbara, 653
O'Neill, Mrs. Michael, 653
O'Neill, Mrs., 380
Onstott, Anna, 482, 765
Onstott, Elizabeth, 298, 360, 467
Onstott, Henry, 360
Onstott, Mrs. Henry, 360
Onstott, Mrs. Rebecca (Davis), 360
Onstott, Rebecca, 360
Oppenheimer, Carrie, 532
Oppenheimer, William, 532
O'Reilley, Catherine, 651
O'Reilley, John, 651
O'Reilley, Mrs. Catherine (McMullen), 651 
O'Reilley, Mrs. John, 651
O'Rourke, Hannah, 369
O'Rourke, Ida E., 369
O'Rourke, James, 369
O'Rourke, Laura G., 329
O'Rourke, Mrs. Hannah (Meyer), 369
O'Rourke, Mrs. James, 369
Orr, Eliza Jane, 478
Orr, Ella Loretta, 478
Orr, Harriet, 478
Orr, Hugh, 669
Orr, Ida Mary, 478
Orr, Isabella, 478
Orr, James Albert, 478
Orr, James H., 350
Orr, James, 669
Orr, Jane C., 642
Orr, Jemima, 669
Orr, Josephine, 350
Orr, Margarette Isabella, 478 
Orr, Mary, 576, 669
Orr, Mr., 669
Orr, Mrs. Harriet (Myers), 478
Orr, Mrs. Hugh, 669
Orr, Mrs. Isabella (Wallace), 478
Orr, Mrs. James H., 350
Orr, Mrs. James, 670
Orr, Mrs. Jane C., 642
Orr, Mrs. Jemima (Hare), 669
Orr, Mrs. Josephine (Cadman), 350
Orr, Mrs. Mary (McKee) Hacket, 669
Orr, Mrs. Sadie (Edenger), 670
Orr, Mrs. William, 478, 669
Orr, Robert Elmer, 478
Orr, Sadie, 670
Orr, William, 478, 669
Osborne, Andrew William, 712
Osborne, Anna, 712
Osborne, D. M., 389
Osborne, Dr. John, 711
Osborne, Dr. William, 396
Osborne, Dr., 396
Osborne, Edgar J., 396
Osborne, Eleanor, 712
Osborne, Francis A., 396
Osborne, Frank, 396
Osborne, Harold, 712
Osborne, Hugh, 712
Osborne, John, 396, 711, 712
Osborne, Lizzie G., 396
Osborne, Lois, 342
Osborne, Maggie, 396
Osborne, Margaret, 712
Osborne, Mary (Richey), 468
Osborne, Mary J., 396
Osborne, Melissa, 712
Osborne, Mrs. John, 396, 711, 712
Osborne, Mrs. Mary J. (Percy), 396
Osborne, Mrs. Melissa (Adams), 712
Osborne, Mrs. Sarah (Abernathy), 396, 711
Osborne, Robert, 712
Osborne, Sadie, 712
Osborne, Sara, 396 
Osborne, Sarah, 396, 711
Osborne, William, 396, 712
Osburn, Chara Louise W., 313 
Osburn, Frank C., 313
Osburn, Franklin, 313
Osburn, Harry G., 313
Osburn, Henrietta W., 313
Osburn, James W., 313
Osburn, Jennie M., 313
Osburn, John, 313
Osburn, Mary E., 313
Osburn, Mr., 313
Osburn, Mrs. Franklin, 313
Osburn, Mrs. Henrietta W. (Warner), 313
Osburn, Nicholas, 313
Osburn, Richard, 313
Osburn, Robert D., 313
Osburn, William W., 313
Osfield, Elizabeth, 628
Oster, Mary, 588
Osterman, Grace R., 726
Ott, Andrealla W., 635 
Ott, D. R., 635
Ott, David, 635
Ott, Edward Howard, 635
Ott, Emma L., 635
Ott, Francis, 635
Ott, Harry C., 635
Ott, John, 635
Ott, Margaret Ann McElroy, 635
Ott, Margaret Ann, 635
Ott, Mrs. David, 635
Ott, Mrs. Margaret Ann (Wentz), 635
Ott, Mrs. Sarah A. (Roadamel), 635
Ott, Mrs. William Edward, 635
Ott, Sarah A., 635
Ott, William A., 635
Ott, William Edward, 635
Otterson, Anna, 420
Otterson, Mary, 732
Oudry, Catherine, 557
Oudry, Edward, 557
Oudry, Mrs. Catherine (Algeo), 557
Oudry, Mrs. Edward, 557
Over, Charlotta, 669
Over, Elizabeth, 669
Over, Jacob, 669
Over, Mrs. Elizabeth, 669
Over, Mrs. Jacob, 669
Overena, John W., 354
Overena, Mary, 354
Overena, Mrs. John W., 354
Overena, Mrs. Mary A. (Finley), 354
Overholt, Abraham, 418
Overholt, Anna, 418
Overholt, Maria, 418
Overholt, Mrs. Abraham, 418
Overholt, Mrs. Maria (Stauffer), 418
Oviatt, Capt. Silas, 659
Oviatt, Mary, 659
Oviatt, Silas, 659
Owen, Margaret, 627
Owen, Mrs., 683
Owens, Annie M., 749
Owens, Caroline, 759
Owens, Catharine, 638
Owens, Catherine, 494
Owens, David, 494, 693
Owens, Edward, 494
Owens, Eleanor, 638
Owens, Elizabeth, 494, 638
Owens, Frank, 638
Owens, George, 494
Owens, Harry, 494
Owens, Helen, 494
Owens, Henry, 759
Owens, Isabella, 638
Owens, Jeannette, 638
Owens, John, 638, 749
Owens, Mary, 494
Owens, Mr., 494, 638
Owens, Mrs. Catherine (Lewis), 494
Owens, Mrs. Edward, 494
Owens, Mrs. Eleanor, 638
Owens, Mrs. Elizabeth (Cramer), 638
Owens, Mrs. Helen (McKinnell), 494
Owens, Mrs. Henry, 759
Owens, Mrs. Jeannette (Black), 638
Owens, Mrs. John, 749
Owens, Mrs. Nancy, 749
Owens, Mrs. Robert, 494
Owens, Mrs. Sarah, 759
Owens, Mrs. William P., 638
Owens, Mrs. William, 638
Owens, Nancy, 749
Owens, Nellie, 638
Owens, Nettie, 638
Owens, Robert, 494
Owens, Sadie, 638
Owens, Sarah, 759
Owens, William P., 638
Owens, William Perry, 638
Owens, William, 638
Owings, Elijah, 711
Owings, Mrs. Elijah, 711
Owings, Mrs. Sarah (Shaffer), 711
Owings, Rebecca, 711
Owings, Sarah, 711