Blum Mark Davydovich (10.08.1937, Kharkiv) — heat engineer.

Mark Blum was the son of David Blum (1892, Odesa Region – 1967, Riga) and Raisa Lapidus-Blum (1896, Kherson).

In 1941, he was evacuated to Sverdlovsk. In 1946, he moved with his parents to Riga. In 1955, he graduated from Riga Secondary School No. 23.

From 1955 to 1956 — laboratory assistant at the “Autoelektropribor” factory.

From 1956 to 1959 — student at the Latvian Agricultural Academy.

From 1959 to 1965 — assembly shop inspector, OGK engineer, boiler operator, and mechanic at the Riga Diesel Plant.

In 1964, Mark Blum graduated from the Riga Polytechnic Institute, qualifying as a heat engineer.

In 1966, he was convicted under Article 184-1, Part 2 of the Criminal Code of the Latvian SSR and sentenced to two years in prison. He was released under amnesty in 1967.

In 1967 he became a worker at the Special Directorate for Major Industrial Construction of the Liepāja Trust.

In 1968, Mark Blum and his mother received permission to emigrate to Israel.

David Blum (1892, Odesa Region – 1967, Riga) — father
Raisa Lapidus-Blum (1896, Kherson) — mother