Hi, Zlatica and Jane. I've been offline for a few days, and just found this. If Nebraska is mentioned, I can always be of help.
In the book, Nebraska-Kansas Czech Settlers, 1891-1895, lists written by Frank Mareš for Hospodař and transcribed by Margie Sobotka in 1980, there are three Tvrz entries.
1. Page 29, Frant. in Saline County who is from Radlice, Dacice, Jihlava. Note that I am transcribing exactly as published; the correct spelling of the village names would probably include some special diacritical marks, i.e. Dačice. Without looking these up, I can only guess. In addition, the settlers sometimes did not know the correct spelling for their village.
2. Page 33, Anton in Saline County, a carpenter, who is from Mestecko, Krivoklat, Praha.
3. Page 97, J. in Box Butte County, a tailor, who is from Ruda, N. Strasice, Praha.
Anton and J. are from Bohemia; Frant. is from Moravia.
No guarantee that he came from any of these places, too, but it at least provides a starting place. You say he was 12 when he came over in 1881? That makes his birth about 1869 (same as my grandfather...). So the next step would be to look in these 3 places and hope.
See this link. While I don't find Paul in 1869 on the index, there are plenty of Tvrz entries!http://actapublica.eu/matriky/praha/prohlizec/8515/?strana=3...
and this one, with Tvrz spelled both ways...http://actapublica.eu/matriky/praha/prohlizec/8503/?strana=2...
Mary in Omaha, NE