[Hannia]

There have to be immigration documents, which should provide his exact place of birth.

Once we know that, than you can easily ascertain if you have any surviving Hryhoryshyn family in Ukraine.
_____________________________________________________________________________

Immigration to France before WW2.

In the twentieth century, France experienced a high rate of immigration from other countries. The immigration rate was particularly high during the 1920s and 1930s. France was the European country which suffered the most from World War I, with respect to the size of its population, losing 1.4 million young men out of a total population of 40 million. France was also at the time the European country with the lowest fertility rate, which meant that the country had a very hard time recovering from the heavy losses of the war. France had to open its doors to immigration, which was the only way to prevent population decline between the two world wars.

At the time France was the only European country to permit mass immigration. The other major European powers, such as the UK or Germany, still had high fertility rates, so immigration was seen as unnecessary while it was also undesirable to the vast majority of their populations. Armenians immigrated to France. The majority of immigrants in the 1920s and 1930s came from southern Europe: Greeks, Italians, Yugoslavs, Portuguese and Spaniards, but also Eastern Europeans: Poles, Russians,
Hungarians and Czechoslovaks; and Belgians (nationality, but composed of both French and Fleming-Dutch elements) and the first wave of colonial French subjects from Africa and Asia. By the end of the Spanish Civil War, some half-million Spanish Republican refugees had crossed the border into France. At this time, Judaism was the second most populous religion in France, as it had been for centuries. However, this would soon change