This is amazing stuff! Not to seem too dense but I want to clarify that I am understanding this correctly:
Yindra was always listed as Jindra
Vlc'nov is definitively the town where his grandparents came from (love the maps!).
The Maricas listed at the top of your post are his grandparents as I have them now
The Maricas in the phone book are people currently living there- I am assuming they do not speak English and would probably not welcome a strangers phone call! lol
I'm sorry but I know literally no Czech- I wasn't sure about 2 of those web sites and what they might mean.
FASCINATING history of the Republic. Considering what the country has been through, it is amazing that records still exist!
Thank you so much! If you see anything further, please let me know- I don't want to work you to death!