Remember when analyzing sources and the information they contain that just because a majority of sources are consistent does not mean they are correct. They may have had the same “original source” that was simply copied over and over and that “original source” may not have been right.
The majority of documents on my grandmother give one place of birth. Two documents give a different place. However, those two are contemporary to her birth and with probable informants who had first hand knowledge. The other documents (significantly more than two) contain information given later by informants who did not have first hand knowledge and only knew what they were told.
Just because the majority of sources agree does not mean that they are correct. Analysis isn’t always that simple.