| Researcher | Contact Details | Current Residence | Birthplace | Descended From Which Immigrant | German Birth Place | Last German Generation |
| Al Machtmes | dnamach@sbcglobal.net | California, USA | Richmond, Minnesota | Johann Michael Machtemes, imig.1880 to USA | Niederraden, Eifel, Rheinland | Christoph Machtemes, b. 1795, Leidenborn |
| Monica Machtemes | marquis666@ozemail.com.au | Australia | Traben-Trarbach an der Mosel | Johannes Machtemes, imig. ? To AUST. | Traben-Trarbach, Germany | Michael Machtemes, b. 1889, ? |
| Leroy Thielman | leroy.thielman@honeywell.com | Minnesota, USA | MN, USA | Johann Machtemes, imig. 1855 to USA | Niederraden, Eifel, Rheinland | Christoph Machtemes, b. 1795, Leidenborn |
| Terry Machtemes | machfam@shaw.ca | Alberta, Canada | Alberta, Canada | Johann Machtemes, imig. 1855 to USA | Niederraden, Eifel, Rheinland | Christoph Machtemes, b. 1795, Leidenborn |
| Conrad Irrgang | Conradirrg@Yahoo.com | Swan Lake, Nicollet Cty, MN | ||||
| MaryAnn Zins | mlz@newulmtel.net | Minnesota, USA | Minnesota, USA | Johann Machtemes & Katherine Adams, immig 1881 | Daleiden, Eifel, Rheinland | Christopher Machtemes & Elisabeth Heinen |
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