If someone enters the stream and becomes a sotapanna (stream winner), then he would have at most, seven lifetimes left. What the stream is, is defined in this answerthis answer as:
This noble eightfold path — right view, right resolve, right speech, right action, right livelihood, right effort, right mindfulness, right concentration — is the stream. (SN 55.5)
Thanissaro Bhikku further comments here that:
The coming-together of these factors is called the stream because it leads inevitably to two things, just as the current of a tributary will lead inevitably to a major river and then to the sea. In the immediate present, the stream leads directly to the arising of the Dhamma eye, the vision that actually constitutes this first awakening. Over time, the stream ensures that — in no more than seven lifetimes — one will be totally unbound.
The Dhamma eye is explained as the ability to see firsthand and experientially, the impermanence of the five aggregates and dependent origination.
My questions are (for rebirths as a human):
How does a reborn stream-winner know that he or she is one?
Does being a stream-winner in a previous lifetime, mean that one would be reborn into a devout Buddhist family in this lifetime or would definitely be led to the Dhamma eventually?
Is the reborn stream-winner's Dhamma eye open immediately at birth, or only after he or she encounters the Dhamma and returns back to the Noble Eightfold Path?
How is it guaranteed that the reborn stream-winner would not choose another path or another teacher, and drop out of the stream, considering that we do not remember previous lifetimes?
Please provide any info from the canon regarding this.