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 a

woman 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
Mordekhai.

Judith Singer

From: "George J. Fogelson" <gjfogelson@...>
Date: Wed, 8 Nov 2017

What are the Hebrew equivalents of the Yiddish names Mortek and Etka?