| Name |
Source: (page) |
| Oldenburg, Gertrude | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (27) |
| Oldenburg, Gilbert C. W. H. | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Harry | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Heinrich Ludwig | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (26) |
| Oldenburg, Henrietta | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Henry | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (26,27,28,29,30) |
| Oldenburg, Henry C. C. L. | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Herman | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, John | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (27,28,29) |
| Oldenburg, John N. | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Lena | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Lillian | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Lilly | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Lizzy | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28) |
| Oldenburg, Louis | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Louise | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (27) |
| Oldenburg, Magdalena | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Maria | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Martha | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Mary | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Minna | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28,29) |
| Oldenburg, Olga | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Paul | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Richard | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Sophia | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (27,28,29) |
| Oldenburg, Walter | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (29) |
| Oldenburg, Wilhelmina Caroline | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (30) |
| Oldenburg, Wilhelmine | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (30) |
| Oldenburg, William | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (27-30) |
| Oldenburg, Willie | Genealogical Info. on Some Surnames-Cook & DuPage Cos.: (28,29,30) |
| Oldfield, Elizabeth Ann | Atlas - Combination Atlas Map of DuPage County, Illinois: (XVI), Atlas - 1874 Atlas & History of DuPage County (Reprint): (15) |
| Oldfield, J. T. | Atlas - Combination Atlas Map of DuPage County, Illinois: (17), Atlas - 1874 Atlas & History of DuPage County (Reprint): (44) |
| Oldfield, Jesse | Atlas - Combination Atlas Map of DuPage County, Illinois: (XVI), Atlas - 1874 Atlas & History of DuPage County (Reprint): (15) |
| Oldfield, Jesse E. | Atlas - Combination Atlas Map of DuPage County, Illinois: (18), Atlas - 1874 Atlas & History of DuPage County (Reprint): (45) |
| Oldfield, John | Atlas - Combination Atlas Map of DuPage County, Illinois: (X,XVI,17,18,20), Atlas - 1874 Atlas & History of DuPage County (Reprint): (1544,45) |
| Oldfield, Joseph | Atlas - Combination Atlas Map of DuPage County, Illinois: (XVI), Atlas - 1874 Atlas & History of DuPage County (Reprint): (15) |
| Oldfield, Joshua | History of DuPage County: (110) |
| Oldfield, M. F. | Atlas - Twentieth Century Atlas of DuPage County …: (146) |
| Oldfield, R. | Atlas - Combination Atlas Map of DuPage County, Illinois: (17), Atlas - 1874 Atlas & History of DuPage County (Reprint): (44) |
| Oldfield, T. J. | Atlas - Combination Atlas Map of DuPage County, Illinois: (17), Atlas - 1874 Atlas & History of DuPage County (Reprint): (44) |
| Oldfield, William | Atlas - Combination Atlas Map of DuPage County, Illinois: (X,XVI,18,25), Atlas - 1874 Atlas & History of DuPage County (Reprint): (15,45), Atlas - 1874 Atlas & History of DuPage County (Reprint): (45) |
| Oldsen, Armen | History of Zion Lutheran Church 1838-1978: (54) |
| O'Leary, Gerard | Newspaper index - Warrenville Digest, 1984-1991 (vital stats): (04/27/1989-8) |
| O'Leary, Kelly Ann | Newspaper index - Warrenville Digest, 1984-1991 (vital stats): (04/27/1989-8) |
| O'Leary, Linda | Newspaper index - Warrenville Digest, 1984-1991 (vital stats): (04/27/1989-8) |
| Olencamp, H. | Atlas - Combination Atlas Map of DuPage County, Illinois: (37), Atlas - 1874 Atlas & History of DuPage County (Reprint): (71) |
| Oleson, | Atlas - Combination Atlas Map of DuPage County, Illinois: (59), Atlas - 1874 Atlas & History of DuPage County (Reprint): (106) |
| Oleson, C. J. | History of DuPage County: (236) |
| Oleson, C. W. | Atlas - Combination Atlas Map of DuPage County, Illinois: (61), Atlas - 1874 Atlas & History of DuPage County (Reprint): (115) |
| Oleson, Charles W. | Atlas - Combination Atlas Map of DuPage County, Illinois: (XIII) |
| Oleson, Richard B. | Atlas - Twentieth Century Atlas of DuPage County …: (146) |
| Oleson, Sivert | History of DuPage County: (108) |
| Olip, John | The Village of Volunteers - Clarendon Hills 1924-1974: (25) |
| Ollier, V. M. | The Elmhurst Story:Biography of Progress 1910-60: (56) |
| OLmstead, Elder | Atlas - Combination Atlas Map of DuPage County, Illinois: (V), Atlas - 1874 Atlas & History of DuPage County (Reprint): (6) |
| Olmstead, Frederick Law | The Village of Volunteers - Clarendon Hills 1924-1974: (03), Elmhurst! 150 Colorful Years: (7) |
| Olmstead, R. W. | Hinsdale, Hinsdale Doings: (286) |
| Olsen, Nan | Elmhurst! 150 Colorful Years: (20) |
| Olsen, S. | Atlas - Combination Atlas Map of DuPage County, Illinois: (44), Atlas - 1874 Atlas & History of DuPage County (Reprint): (73) |
| Olson, | The Village of Volunteers - Clarendon Hills 1924-1974: (47,49) |
| OLson, A. E. | Recollections: Story of Villa Park, Illinois: (44) |
| Olson, Anna Olive | Glen Ellyn's Story & Her Neighbors: (370) |
| Olson, C. | Glen Ellyn's Story & Her Neighbors: (370) |
| Olson, Edward | The Village of Volunteers - Clarendon Hills 1924-1974: (46) |
| Olson, Emil | The Village of Volunteers - Clarendon Hills 1924-1974: (61) |
| Olson, Harry Mrs. | The Elmhurst Story:Biography of Progress 1910-60: (44) |
| Olson, Martin C. | The Village of Volunteers - Clarendon Hills 1924-1974: (13,25) |
| Olson, Marty | The Village of Volunteers - Clarendon Hills 1924-1974: (28) |
| Olson, Myrtle | The Elmhurst Story:Biography of Progress 1910-60: (54) |
| Olsson, H. L. | The Elmhurst Story:Biography of Progress 1910-60: (20) |
| Olufs, Harold F. | Newspaper index - Warrenville Digest, 1984-1991 (vital stats): (05/11/1989-4) |
| Olufs, Lillie S. | Newspaper index - Warrenville Digest, 1984-1991 (vital stats): (07/10/1986-4) |
| Ondriska, Albert | The Village of Volunteers - Clarendon Hills 1924-1974: (40) |
| O'Neill, Helen | Hinsdale, Hinsdale Doings: (viii,109) |
| Onnen, Mary | The Elmhurst Story:Biography of Progress 1910-60: (47) |
| Orak, John J. | The Village of Volunteers - Clarendon Hills 1924-1974: (25) |
| Orcutt, Danbiel H. | History of DuPage County: (55) |
| Orcutt, Philip | History of DuPage County: (123) |
| Ord, E. O. C. | History of DuPage County: (76) |
| Ordun, Elizabeth Ann | Newspaper index - Warrenville Digest, 1984-1991 (vital stats): (02/16/1984-7) |
| Ordun, Joyce | Newspaper index - Warrenville Digest, 1984-1991 (vital stats): (02/16/1984-7) |
| Ordun, Michael | Newspaper index - Warrenville Digest, 1984-1991 (vital stats): (02/16/1984-7) |
| Orestes, Sr. M. | Story of a Parish: Immaculate Conception (Catholic): (30) |
| Ori, William | History of DuPage County: (236) |
| Orlikiewicz, Stanley | Story of a Parish: Immaculate Conception (Catholic): (36) |
| Orloft, Kenneth | The Village of Volunteers - Clarendon Hills 1924-1974: (48) |
| Ornkamp, Amanda | Archival Resources on Germans in Elmhurst: (24) |
| Orr, E. P. | Hinsdale, Hinsdale Doings: (64) |
| Orth, | The Village of Volunteers - Clarendon Hills 1924-1974: (60) |
| Orton, V. L. Mrs. | The Elmhurst Story:Biography of Progress 1910-60: (48) |
| Ory, | History of DuPage County: (246) |
| Ory, F. | Atlas - Combination Atlas Map of DuPage County, Illinois: (11), Atlas - 1874 Atlas & History of DuPage County (Reprint): (37) |
| Ory, F. S. | Atlas - Combination Atlas Map of DuPage County, Illinois: (X) |
| Ory, Francis S. | Atlas - Combination Atlas Map of DuPage County, Illinois: (11), Atlas - 1874 Atlas & History of DuPage County (Reprint): (36) |
| Oser, Job Mrs. | Some York Township Cemeteries-Burials: (2) |
| Oser, Jonas | Some York Township Cemeteries-Burials: (2) |
| Osgoodby, R. H. | Hinsdale, Hinsdale Doings: (114), Hinsdale the Beautiful 1897 (newspaper Supplement): (28) |
| Osgoody, R. H. | Old Hinsdale Homes (Binder): (m20) |
| O'Shea, | Story of a Parish: Immaculate Conception (Catholic): (60) |
| O'Shea, William | Story of a Parish: Immaculate Conception (Catholic): (50) |