When my grandfather, Benzion Katz, the Rector of the University of Tel Aviv, died in 1968, my grandmother Klara Katz received many, many letters of condolence. Two of the most notable are from my grandfather’s brother, Juliusz Katz-Suchy, and from his niece, Irena Narell.
Here is the letter by Irena Narell.
Katz-Suchy and Irena Narell had a complicated relationship as described here;
https://discover.hubpages.com/politics/Chocolate-Under-Communism
Here is a song sung by Kate Gladstone about them.
Below is a clip of Juliusz Katz-Suchy before the United Nations, talking about the siege of Jerusalem. (His brother Benzion was within the walls of the besieged city at the time.)