Heinrich Peter Kaÿser, son of Conrad & Anna Christina Kaÿser, was baptized on 5 March 1715 in Buches, near Büdingen. He married there on 11 April 1739 to Anna Margaretha from Binsaches (perhaps Bindsachen). They have three children baptized there: Anna Margaretha (30 May 1744), Johann Conrad (22 May 1746), and Johannes (26 December 1753).
Anna Margaretha married Ludwig Henkel/Hinkel. Konrad married Gertraude Müller. These two couples, along with the Kaiser parents and other siblings arrived in Messer on 18 June 1767 and are recorded there in the 1767 Census in Household Nos. 47-49.
- Bonner, Wayne H. Volga German Settlers Identified in Isenburg and Other German Church Records Part I (Gardena, CA: Wayne Bonner, 2007): 43.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 142-143.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): 242.