In this record, a son Friedrich, age 18, is named. He would have been 17 in 1766 and should have appeared in the Kulberg Lists, but is missing.
Family # 22
Head of the Household Samuel Rusch, age 68, Lutheran farmer from Pommern
Spouse Anna Margaretha, age 41
Child #1 Friedrich, age 18
Child #2 Johann Georg, age 12 [should have been 10]
Child #3 Christian, age 4 [should have been 2]
Child #4 Dorothea, age 10 [if Catharina Maria Dorothea, should have been 9]
Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767, Herausgegeben von Alfred Eisfeld under Mitarbeit von Sabine Eichwald, Published by the Nordost-Instsitut - 38085 Göttingen, 2005; page 76, family #22, Samuel Rusch, age 68, Lutheran Farmer from Pommern; wife: Anna Margaretha, age 41; son Friedrich, age 18; son Johann Georg, age 12; son Christian, age 4; daughter Dorothea, age 10.