Address: Praha 1, Jáchymova 27/4, v chodníku před vchodem do domu,

Max Eckstein was born on 17 April 1896 in Liběchov. He was the son of Ferdinand and Julie Eckstein. He had seven siblings: Alois (1890-?), Arnošt (1891-1942), Anna Salus (1892-1942), Martha (1894-?), Emma (1898-?), Leo (1901-1941) and William (1904-1969). His last known address in Prague was Regnartova 4. He was deported to Łódź Ghetto on 26 October 1941. His transport number was 369. He was murdered by the Nazi regime.
Last residence before deportation: Prague I
Address/place of registration in the Protectorate: Prague I, Regnartova 4
Transport C, no. 369 (26. 10. 1941, Prague -> Łódź)
Murdered
Note: First of the ten stones revealed in Prague

At least four of his brothers and sisters as well as two nices and two nephews were also killed during the Shoah

https://www.holocaust.cz/en/database-of-victims/victim/143383-max-eckstein/