I have pieced together bits of family lore with US immigration and census date to define a partially substantiated Schwetz family line. I am sorry that this system does not seem to preserve even paragraph formatting to make it easier to read (if the preview is accurate). I used one or more * to distinguish generations.

What I have starts in Latvia with the marriage of a Schwetz and a Lapouze, probably about 1865.

They have children including:
* Rebecca; probably before 1867, probably Latvia.
* Boris; 1867, Latvia - 1931, Portsmouth,Virginia.
* Olga; no records.
* Jacques; 1874, Rubinachky(?) or Vitebsk, Russia - 1957, San Bernadino, CA (while visiting from Belgium).
* (suspicious gap here).
* Salomon; 1885, Vitebsk, Russia - after 1941, USA.
* Marya; 1887, Julioni(?), Russia - 1971, Los Angeles, CA.

* Boris, his wife Bluma/Blanche and two children migrated to the US in 1907 and settled in Portsmouth, Virginia. Their children were:
** Belle; 1903, Russia -
Belle married a man named Levinson and might have had
children.
** David B (aka Boris); 1905, Russia or Latvia - 1931 Portsmouth, VA.
David married Ada Smolensky and had at least one
child, Boris.
** Benjamin M (aka Moses); 1908, Portsmouth, Virginia - 1982, same.
Benjamin married Ruth (maiden name unknown).

*Jacques migrated to Belgium and became a respected physician doing work in Africa. He had no children.

*Salomon migrated to Belgium, returned to Russia and became secretary to the Russian ambassador to France, then migrated to the US in 1941. He had no children.

*Marya/Marie married Sergei Zadolin(e) and live in Grozny, Chechnya, where she had one child:
** Nadezhda/Nadia; 1907, Grozny - 2005, Los Angeles, CA.
Then Marie divorced and moved with Nadia to Lausanne, Switzerland, where she married a man named Cornaz, whom she also divorced. She migrated to the US in 1940.
** Nadia migrated to the US in 1935 and married Herbert
Wilson in 1938. She had three children, all still
living.