Sometimes a document contains a name or a reference that is a complete mistake and there's no other explanation for it. Clerks "space out" when completing a record or get distracted. However, don't write off something as an error simply because it disagrees with an assumption you made or a dearly held conclusion. Have valid reasons (preferably from other independent sources) for deciding something is a mistake.
"Conflicting with family tradition" usually is not sufficient to conclude something is a mistake.