My Greatgrandmother

I am trying to confirm that my greatgrandmothers name was Anna Prenicka born 17/7/1857 in Bohemia and married my greatgrandfather, Frank J Kovarik born in Iowa in 1856. Anna died in 1913 and Frank J died in 1934. His father was Jan, born in 1836 in Vestec and his mother was Marie Satava. There is confusion as to the right Frank J. Some posts I have seen are the Frank J born in 1866 and father was Jan Kovarik and Marie Jirova. This is not my linage as I can tell.
I would appreciate if someone could clarify this.
Thanks.