Hi - Etka is the diminutive form of Eta. According to the JewishGen
Given Names Database, there is no Hebrew equivalent for Eta: it is
from the Yiddish / German word for "noble". (It was not crucial that awoman have a Hebrew name.)
I'm guessing that Mortek (which I haven't ever seen before) is a
variant of Mortke. Mortke is a diminutive form of the Hebrew name
From: "George J. Fogelson" <gjfogelson@...>
Date: Wed, 8 Nov 2017
What are the Hebrew equivalents of the Yiddish names Mortek and Etka?