Treizon (Treisohn) Yakov (Jakow) Borisovich (15 February 1936, Līvāni) — physician.

Yakov Treizon was the son of Boris-Ber Treizon (1894, Līvāni — 1939, Daugavpils) and Genya Treizon (née Rotbart) (1894, Jēkabpils — 1979, Riga). In 1954, he graduated from Līvāni Secondary School No. 2. The same year, he entered the Saratov Medical Institute, later transferring to the Riga Medical Institute.

In 1959–1960, he worked as a feldsher at the Riga ambulance station. In 1960, he graduated from the medical faculty of the Riga Medical Institute.

In 1960–1962, he worked as a district physician at the Daugavpils City Hospital. In 1962–1965, he was a postgraduate student at the Institute of Experimental and Clinical Medicine of the Academy of Sciences of the Latvian SSR, specializing in metabolism and clinical nutrition.

From 1965 to 1978, he worked as a dietitian at the Republican Clinical Hospital named after Stradiņš. He was a member of the Communist Party (CPSU) from 1963 to 1978.

In marriage with Raisa Girshevna Treizon (née Manevich) (1937, Leningrad), two sons were born: Boris Treizon (1964) and Leonid Treizon (1974).

In 1979, Yakov Treizon received permission to emigrate to Israel at the invitation of his cousin, Moisey Treizon (1922, Rēzekne). His son Boris lived and worked in California in the 1980s.

Family:

Raisa Girshevna Treizon (née Manevich) (1937, Leningrad) — wife
Boris Treizon (1964) — son
Leonid Treizon (1974) — son
Boris-Ber Treizon (1894–1939) — father
Genya Treizon (née Rotbart) (1894–1979) — mother
Ida Shneyder (née Treizon) (1922, Līvāni) — sister
Gita Besser (née Treizon) (1924, Līvāni) — sister
Liya Vasnina (née Treizon) (1926, Līvāni) — sister
Boris Treizon (1964) — nephew