During the Great Purge, he was arrested on 15 August 1937 and later executed in Mariupol.
Leonid Veyner was born in Gorlovka in the family of the tailor at the 1897 mine.
In 1936, he was awarded the "Polar Star" order of Mongol for defeating the Japanese at Lake Buir-Nuur.
Veyner's older brother, Mark Veyner, also working in the fifth mine, was elected as a member of the Executive Board of the working deputies in the Gorlovsko-Shherbinovskom district in 1917.
From October 1917 to March 1918, he was a military commander of the Nikitovka station.