Nancy: Beloved wife and mother
Simon: Beloved husband and father
Nancy: Yiddish name is נעכלא (Nechla)
Simon: Hebrew name is שמעון (Shimon)
Kenneth: Yiddish name is קושה בן שמעון (Kusha son of Shimon), so Kenneth is the son of Simon.
Bertha: Yiddish name is ביילא לאה בת מרדכי (Beila Leah daughter of Mordechai), so Bertha is presumably Simon's unmarried older sister.