If someone lives their entire life under the assumption that their name is X, and suddenly finds out that their name is Y, are there serious halachic ramifications that can result?
More specifically, what is the effect with regards to:
- Any halachic documents that refer to them (e.g. a Kesubah or Get)
- Any halachic documents that refer to their children (i.e. child ben X)
And what are the future ramifications as well? Does the person continue using his old name? Does he switch now?