Grinker Ion Markovich (25 February 1896, Liepāja) — butcher.

Son of Markus Grinker (1864, Shkudi, Lithuania – 1918, Liepāja), a labourer, and Frida Grinker (1870, Liepāja – 1941, Riga), a seamstress.

He completed six years at the Liepāja Municipal School. From 1910 to 1918, he apprenticed as a butcher and sausage-maker. Between 1918 and 1924, he worked as a butcher in Grinfeld’s shop in Liepāja. In 1924, Grinker moved to Riga, where he worked as a shop assistant in Rozin’s store until 1941.

In 1941, he was evacuated to the village of Linevo in Stalingrad Oblast, where he worked at a local factory until 1946. After returning to Riga in 1946, he was employed at the Riga Canning Factory “Atlas” until 1947. From 1947 to 1952, he worked for Riga’s 4th City Food Trade Organisation. In 1952–1953, he was a procurement worker for agricultural produce with the Riga Workers' Cooperative.

Between 1953 and 1954, he worked for the “Invalid” artel in Talsi. In 1954, Grinker was convicted of speculation and released from custody in September 1955. From 1955 to 1956, he worked as a meat boner in the “Brīvais darbs” artel. In 1959–1960, he was employed by the Salaspils Consumers’ Society. From 1960 to 1970, he worked in the food trade sectors of the Proletarian and Moscow districts of Riga.

In his marriage to Khoda Grinker (née Blekhman) (1901, Liepāja), he had two daughters: Sulamit Maizenberg (née Grinker) (b. 1931, Riga) and Roza Feitelman (née Grinker) (b. 1933, Riga).

Grinker’s parents, his sister Roza Seligman (née Grinker) (1894, Liepāja – 1941, Riga), and his brother Aba Grinker (1898, Liepāja – 1941, Liepāja) perished in the Holocaust. His sister Lili Lassen (née Grinker) (1903, Liepāja) was living in Copenhagen by the late 1950s.

In 1973, Ion Grinker received permission to emigrate to Israel.

Khoda Grinker (née Blekhman) (1901, Liepāja) — wife
Sulamit Maizenberg (née Grinker) (1931, Riga) — daughter
Roza Feitelshman (née Grinker) (1933, Riga) — daughter
Markus Grinker (1864, Shkudi, Lithuania – 1918, Liepāja) — father
Frida Grinker (1870, Liepāja – 1941, Riga) — mother
Roza Seligman (née Grinker) (1894, Liepāja – 1941, Riga) — sister
Aba Grinker (1898, Liepāja – 1941, Liepāja) — brother
Bella Brandman (née Grinker) (1900, Liepāja – 1950, Riga) — sister
Lili Lassen (née Grinker) (1903, Liepāja) — sister