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Looking for the 4 children of Joachim Henry Emanuel Pinkus 1914-1981 his wife was Karin Yvonne Kirchbach 1919-1999 both b Berlin moved to Holland 1937/38
1 son Michael b & d 1942

Unfortunately, it's highly unlikely that anyone seeing your post will know of this family, Ian.

No GR member has any of them on their GR tree.

Someone called Vicki has a Michael Pinkus born 1942 on her GR tree - no place of birth given, but looking at other Pinkuses on her tree, they seem to be a family in Australia - so not the right ones.

Karin (and other family members) is on 8 trees on Ancestry - 6 public, 2 private.
However, Michael is the only child mentioned on any of the public trees - born in Berlin, and died in Amsterdam.
None of the trees offer any documentary proof.

Looking at the dates shows that their arrival in Holland was the start of particularly difficult times.
You have death years for the couple - so I presume you know what country they died in. Essential to know where in terms of research. Getting their death certificates might lead you to other family members.

Added: this request has also been added to Rootschat which mentions 4 children.

A private tree on GENI says both died in Amsterdam. You need to look into how to obtain Dutch records.

Ancestry has 4 trees with Joachim listed.
Take out a free trial with Ancestry and search for Joachim
Find the Joseph-Sonn tree

This tree names a son of Joachim
The son's wife and children are also listed
The male child appears to have several internet webpages
The daughter is listed on Facebook and Instagram

The same tree also lists the following

Joachim Henry-Emanuel Pinkus
in the Free Access: USC Shoah Foundation, Holocaust – Jewish Survivor Interviews

Have you thought of getting Karen’s death cert????

What research have you done so far?

I have sent a PM to Ian with the names of those contained within the tree subject of my post above