by chance I found this website. Really, I was surprised that here is somebody related to Anna Liska (ne้ Bosak). She was my greatgrandmother !!!
Her daughter Bozena (my grandmother) was born on July 14, 1916 in Heerlen (sometimes my grandmother mentioned Hoensbroek). Alas, she died already a few years ago. On Dec. 16, 1946 she married Pavel Radiansky in Cheb (now the Czech Republic) where she stayed and lived. This couple had 3 children: Anna (my mother), Jan, Pavel and Vilem (William). Vilem was born 1945 in Amsterdam (he was a son of Bozena, but not of Pavel Radiansky). It is said that his father died in the Netherlands due to accident (he fell down from a roof during a work).
Just for your additional info. Anna Bosak's husband Vaclav Liska is buried in Teplice (The Czech Republic), together with his daughter and grandchildren.
If you would like to have more info (plus some ancestral photos), let me know.