Baba can also mean grandmother or godmother depending on when the records were recorded. There's a really cool translation guide I found on translating parish records from the Czech Republic on Cyndi's List. Czech records will be in one of three languages: Latin, German or Czech. The letters s and z are used interchangeably in the Czech language and women's surnames will have -a or -ova at the end, whether it is the maiden or married name.
I am leaving for the Czech Republic in about 3 weeks and plan to do some parish record research over there when I'm not in class (study abroad program)...