I "did the math" and if Barbora died in 1775 at age 42, she might have married Andreas as early as 1751, age 18. But what do I find, but a marriage record for Margaretha Skula on strana 87, 10 Nov 1749.http://actapublica.eu/matriky/brno/prohlizec/6324/?strana=87
The marriage to Barbara is on strana 94. 19 Sep 1761. So the three marriages were in 1749, 1761, and 1775.
This has been a very productive day, hasn't it. Thanks for your help. I had no idea we would discover so much.