The Berl KATZ family

A letter from Argentina and then an email from a grandson caused me to look closer  at the family of Berl KATZ.

Berl KATZ was born in 1874 and was married twice.
His first wife Malka LUDNER/ LUDMER , died in 1915, only 32 years old.

With Malka he had the following children:

Jozef KATZ  born 1905

Tobias Jakob KATZ born 1907

Rachmiel KATZ born 1909

Mendel KATZ born 1911

Chaja KATZ born 1914

In 1923 he married his second wife Chaja GOLDSTEIN.
With Chaja he had the following children:

The twins Hersz and Moses Rabon KATZ  born in 1923. Moses died as a baby.

Rachel KATZ born 1926

Chaim Lazar KATZ born 1928

Ester Sara KATZ born 1932. Sara Ester died as a baby.

Berl KATZ' son from his first marriage, Mendel KATZ, born in 1911, managed to emigrate to Argentina in 1939. Mendel's brother Rajmiel/Rachmiel KATZ, born 1909, was already in Argentina.
So we now know that the two brothers Rajmiel/Rachmiel and Mendel KATZ survived by escaping to Argentina.

We also know that their sister Chaja, born in 1914, survived the Holocaust.

Can you help Mendel KATZ' daughter find out  what happened to the other siblings of her father?

Rachmiel KATZ submitted  Pages of Testimony for the following three  in 1979, one with his sister,  though the handwriting is not so clear:

1. His father Berl KATZ

2. His stepmother Chaja KATZ 

3. His brother Tobias KATZ

(Please correct me, if I am wrong.)


Josef KATZ
There is a Page for Josef KATZ born 1907 in Basnia Dolne, married to Eidel and with two young children, Yecheskel 11 and Zlata, 3 years old. They were in Wielkie Oczy during the war. There is no name of the parents of this Josef KATZ,  so it is not quite clear if this is Berl and Malka's oldest son who was born in 1905.

Is this Josef KATZ on that Page of Testimony,  indeed the son of Berl KATZ?