|
| Surname | Timeline | Researcher |
| Borowski | Mid 19th-Late 20th Cent. | Frank Meduna - anudemknarf@comcast.net |
| Engeldinger | Late 19th-20th Cent. | Carol Schatz - fcschatz@gorge.net |
| Impelman(s) | 1885-1960 | Barbara - grandmas@grandmastree.com |
| Rea | Late 19th-Early 20th Cent. | Gary Rea - garyrea@cox.net |
| Schatz | 20th cent. | Carol Schatz - fcschatz@gorge.net |
| Schultz | Mid 19th-Late 20th Cent. | Frank Meduna - anudemknarf@comcast.net |
| Sinrud | 19th-20th cent. | Doug Sinrud - oldblue@fidalgo.net |
| Wilmann | 19th cent. | Bjorn Olsen - bjorn.olsen@aftenposten.no |
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