This article is within the scope of WikiProject Czech Republic, a collaborative effort to improve the coverage of the Czech Republic on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
The Wenceslas link here leads to St Wenceslas (as in Good King Wenceslas although he was only a Duke). It should really go to King Wenceslas I who reigned 1230-1253. I can find a birthdate for Vladislav Jindrich, but I dont have it to hand right now. I'll add it as soon as possible.