Type D. - Willenberg is a Dorf (Village).
Lvl I Pr. - Level I shows which Kingdom or State the place is located in. Willenberg is located in Preussen.
Prov Westpr. - The Province shows which Province or State the place is located in. Willenberg is located in Westpreussen.
RB Marienwerder - The Regierungsbezirk for Willenberg is Marienwerder. The Regierungsbezirk is a government district that is in hierarchy between the State and Kreis level.
Kr Stuhm - The Kreis for Willenberg is Stuhm. A Kreis is a government district (similar to a U.S. county).
AG Marienburg Westpr. - The Amtsgericht for Willenberg is in Marienburg Westpr. The Amtsgericht is where the Lower District Court is located.
BKdo Marienburg Westpr. - The Bezirkskommando for Willenberg is in Marienburg Westpr. The Bezirkskommando is the District Military Command. You can look in the BKdo to find military records.
StdA Tessensdorf - The Standesamt for Willenberg is in Tessensdorf. The Standesamt is where the Civil Registration Office is located.
A Tessensdorf - The Amtsbezirk for Willenberg is Tessensdorf. The Amtsbezirk is the District Office.