| | Surnames starting with C | |
| C-1 | Carolan, James and Elizabeth (Woodhouse) | C-1 |
| C-1 | Carolan, John and Johanna (Casey) | C-1 |
| C-2 | Carolan, Joseph and Dorothy (Werhan) | C-2 |
| C-2 | Carolan, Phillip and Ellen (Donlan) | C-2 |
| C-3 | Carolan, Phillip J. and Effie (Willson) | C-3 |
| C-4 | Case, Richard and Charlene (Wilkins) Anderson | C-4 |
| C-4 | Cassis, Joseph III and Joyce (Akre) | C-4 |
| C-5 | Casterson, Bernard and Martha (Hovey) | C-5 |
| C-5 | Casterson, James and Shirley (Thompson) | C-5 |
| C-6 | Casterson, Josiah and Augusta (Busness) | C-6 |
| C-7 | Casterson, Lawrence and Ethel (Gulbro) | C-7 |
| C-7 | Casterson, Norman and Gena (Rauk) | C-7 |
| C-8 | Christen, Clarence and Elizabeth (Walton) | C-8 |
| C-8 | Christen, Frank and Dorothy (Dravis) | C-8 |
| C-9 | Christen, Loyd and Josie (Vail) | C-9 |
| C-9 | Christen, Sven and Signe (Homme) | C-9 |
| C-10 | Christensen, Lowell Thomas and Diane Ruth (Butt) | C-10 |
| C-11 | Christianson, John and Birgitte (Povelsen) | C-11 |
| C-12 | Christianson, Kenneth and Marian (Peterson) | C-12 |
| C-13 | Cibuzar, Joseph and Catharine (Pezek) | C-13 |
| C-13 | Cibuzar, Joseph and Tercia (Drobil) | C-13 |
| C-14 | Clauson, John and Christine (Peterson) | C-14 |
| C-15 | Clauson, Peder and Mina (Rud) | C-15 |
| C-16 | Cline, Dennis and Cheryl (Sersland) | C-16 |
| C-17 | Cline, Gary and Mary Jo (Massman) | C-17 |
| C-17 | Cline, Mark and Dianne (Sivesind) | C-17 |
| C-18 | Cline, Robert and Vernetta (Bolson) | C-18 |
| C-19 | Coffeen, Alvaro "Roy" and Ida (Olson) | C-19 |
| C-19 | Cole, Duane and wanda (Lensing) | C-19 |
| C-19 | Coleman, Benjamin and Martha (Cox) | C-19 |
| C-20 | Conway, Patrick and Sally (Koenig) | C-20 |
| C-20 | Corlett, Earle and Irene (Kishman) | C-20 |
| C-21 | Cornell, Family in Winneshiek | C-21 |
| C-22 | Crabtree, Keith and Dorothy (Johnson) | C-22 |
| C-23 | Crawford, Darrel and Mary (Schlee) | C-23 |
| C-23 | Crawford, Leonard and Iona (Rocksvold) | C-23 |
| C-24 | Crawford, Lynn and Ruth (Marston) | C-24 |
| C-25 | Crawford, Thomas J. and Helen (Cavin) | C-25 |
| | Surnames starting with D | |
| D-1 | Dady, Norma (Steele) | D-1 |
| D-1 | Dahl, Barry M. | D-1 |
| D-2 | Dahl, Bertin "Bert" and Karoline (Stenkjaer) | D-2 |
| D-2 | Dahl, Arthur and Alice (Thompson) | D-2 |
| D-3 | Dahl, Arthur and Alice (Thompson) Cont. | D-3 |
| D-4 | Dahly, B. O. | D-4 |
| D-4 | Dahly, Charles and Josie (Fuller) | D-4 |
| D-4 | Dahly, Gerald and Elizabeth (Downie) | D-4 |
| D-4 | Dahms, Wayne and Colette (Kipp) | D-4 |
| D-5 | Dalbey, Charles "Wendell" and Verna (Peterson) | D-5 |
| D-24 | Dale, Jim and Barbara | D-24 |
| D-6 | Dale, Rolf S. and Luella (Welper) | D-6 |
| D-7 | Dalen, Elmie and Family | D-7 |
| D-8 | Daniels, Walter W. and Rebecca (Sersland) | D-8 |
| D-9 | Danielson, Andrew and Lesa Patrina (Hagen) | D-9 |
| D-9 | Darling, Roy and Freda (Helwig) | D-9 |
| D-10 | Daubney, Family | D-10 |
| D-11 | Davis, Frank Wright Dr. and Mrs. | D-11 |
| D-11 | Davis, Neal Adair and Marjory (Womeldrof) | D-11 |
| D-12 | DeCou, John and Tillie (Peck) | D-12 |
| D-13 | Dickman, Dwight and Darlys (Bosch) | D-13 |
| D-13 | Digre, Sherry (Shattuck) | D-13 |
| D-14 | Dinger, Clifford and Virginia (Wilbur) | D-14 |
| D-14 | Dinger, Richard and Mildred (Nordheim) | D-14 |
| D-15 | Dirks, Esler C. and Lillie a. (Dresselhaus) | D-15 |
| D-16 | Dobrodinsky, Adalbert "Albert" and Antonia (Konrad) | D-16 |
| D-16 | Dodge, John E. and Naida F. (Sheetz) | D-16 |
| D-17 | Dolley, Frank Henry | D-17 |
| D-17 | Donlan, Patrick and Bridget (Burns) | D-17 |
| D-18 | Dostal, Jan and Teresie (Kvapil) | D-18 |
| D-19 | Dostal, John and Mary (Riha) | D-19 |
| D-19 | Dotseth, John and Millie (Nylund) | D-19 |
| D-19 | Dotseth, Ole and Gusta (Hamersburg) | D-19 |
| D-20 | Doubek, Joseph and Clara (Huber) | D-20 |
| D-21 | Dresselhaus, Elmer and Gladys (Nordheim) | D-21 |
| D-21 | Dresser, Wilbur and Martha (McMartin) | D-21 |
| D-22 | Drilling, Donald and Ramona (Murphy) | D-22 |
| D-22 | Duff, David and Catherine (Lemon) | D-22 |
| D-22 | Duff, David and Catherine (Lemon) Descendents | D-22 |
| D-23 | Duff, Family - Canadian link | D-23 |
| D-23 | Duff, Jacob - Pioneer | D-23 |
| | Surnames starting with E | |
