'Klas Peters was the son of Klaas Peters (Jun 1793, Neuenburg-21 Nov 1837) ... and the grandson of Johann Peters (1 Jan 1750-4 May 1834) and Helena Neufeld of Neuenburg and Nieder Chortitza.'
The identification of Johann's wife as Helena Neufeld is apparently based on Chronicles and Genealogy of Abram Edmund Klassen Family by Isaac P. Klassen, David Friesen and Helena Braun. Schapansky, in The Old Colony (Chortitza) of Russia (p. 307) states "The reference to a Johann Peters who married Helena Neufeld (b. 1771) appears to refer to Johann Peters junior" - that is, the son of Johann Peters (1750-1834).