I think the original family name in Bohemia was Jansky, but the spelling may have been adapted to Yansky here in the USA. I have encountered 4 individuals that appear to be half-brothers/sisters, but would appreciate further input. All settled in the Hillsboro-Yuba area before 1875.
In Union Twp of Vernon county is FRANTISEK JANSKY(b 1824 -d 1898), married to Josefa (1827-1893), they came to USA between 1850-1864, children are Mary (1850-1936) & John (1864-1941).
On the adjacent farm we find Martin Wopat (1831-1913) married to MARY JANSKY (1835-1920), came to USA in 1863-4, children: Frank (1861-1928), Wencil (1865-1944), Josephine (1868-d before 1944), Joseph (1870-1946) and Fred (1879-1955). In 1880 Mary’s mother, Catherine Yanska (sic) age 66, was also listed in their household census.
About 3 miles away in Bloom Twp of Richland County is JAN JANSKY (1842-1933) married to Katherine Kaukl (1837-1902), came to USA in 1867, children: Of 8, only Wencil (1866-1962), Cyril(1870-1959), Mary (1873- after 1933) and Emma (b 1880) reached adulthood.
Finally, about 10 miles away in Hillsboro Twp of Vernon County is Peter Hotek (1827-1906) married to TERESA YANSKY (1834-1910) whose death record indicates she is the daughter of “Frank" Yansky, came to USA in 1858 and lived in Madison until moving out to their farm in 1873, children: Mary (1857-1903), Frances (1859-1948), Anna (1862-1942), Josephine (1865-1950), Pauline (1867-1953) and Peter (1870-1951).
The last three could all be children of “Frank” & Caroline, but if Frantisek is also the son of “Frank”, his mother must have been a wife preceding Caroline. Does anyone know if I am on the right track or just confusing some cousins or even more distantly related people?