The Vogler family originated in the town of Radmühl in the parish of Unterreichenbach, near Gelnhausen. The following records for children of Nicolaus Vogler are found in the Unterreichenbach parish books: Anna Margaretha Vogler, baptized 21 Sep 1757, Eva Catharina Vogler, baptized 8 Dec 1759, death of unnamed son, age 1 ½ on 23 May 1763, Johann Georg Vogler, born 27 Sep 1764. The Vogler family (misspelled Fegler in the Kulberg book) arrived in Russia on 8 Aug 1766. The family members are listed as follows: Nicolaus, a smith from Isenberg, his wife Anna, and children Anna, 10, Eva, 7, and Johann, 2. On the next line in the Kulberg book are Heinrich Nagelschmidt and his wife Elisabeth. In the Norka 1767 Census (First Settler’s List), the family (household 130) is reported as Nicolaus, 33, his wife Anna Margaretha, 33, children Anna Margaretha, 12, and Eva Katharina, 8, and mother-in-law Elisabeth Margaretha, age 66. It appears that the Nagelschmidt couple listed in the Kulberg book are Nicolaus Vogler's in-laws. The Nagelschmidt couple was married in Unterrichenbach on 8 Feb 1730.
Parish records of Unterreichenbach on Archion.de.
Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): p. 212.
Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Nordost-Institute, 2005): p. 264.