Dobry den Dave, I never heard from A. Wilcox who posted the original message regarding Maras from Bohemia who emigrated to southwest Wisconsin.
I do have some information. It might be better if we email directly. However, my great grandmother was Katerina Mara from Jamny #1 and was married to Josef Lechnir from Jamny #5. Katerina's parents were Josef Mara from Jamny #19 and Rosalie Hradek from Tresne #10.
Josef Mara's parents were Matej Mara from Jamny #1 and Mariana Zelenka from Paseky #2. Rosalie Hradek's parents were Vitus Hradek from Tresne #10 and Veronika Zizka/Poskocil from Tresne #18.
I believe that Eugene Mara who published his Mara genealogy from Prairie du Chien, WI has ancestors from different villages.
I hope you find this interesting. I am willing to correspond.