Right off the bat, there is no connection to the people you mentioned. Let me explain that the Jancar or Janczar family,
my mother's mother side, has been a research headache for me
for many years. My grandmother evidently was illegitimate for she carried her mother's name. My grandmother was born in Skalica now Slovakia, but in the latter part of the 1800's was most likely part of the Moravia or what is now the Czech Rep. her records where found in Hodonin, Czech Rep. She emigrated to the USA in June 1907, with her record to leave from the place called Straznice, Czech Rep. Two hundred years ago there was a Bailiff in the Straznice castle named Jancar. The castle is now a museum/archive/? I wrote several years ago the the director who happened to be related to the Jancar's but he retired and turned my search request over to his replacement who was not interested to follow-up on my request. The possibility of a Polish connection is viable. Polish people did migrate South to what was once the old Austro-Hungarian Empire. Slovakia was part of Hungary. After 1918 is was called Czechoslovkia. The Jancar name in the USA became Yancar as the "J" was pronounced as a "Y".The present Slovak Rep. borders Poland in the Northeast part of the country. I rafted down the river separating Poland and the Slovak Rep. in 1998.
At this time I do not know how I can help you. If you care to bookmark my e-mail address, I will do the same for you should new data become available.
Ed, in Pleasantville, NY
30 miles from Ground Zero, NYC.