Can we identify an individual from their palm lines. Is there any uniqueness for palm lines among family members ?
It was tricky searching for this through the morass of palmistry sites. But, in the field of biometrics, I found the article "Palm Print Recognition", which states that (bolding mine):
Because fingerprints and palms have both uniqueness and permanence..
it has been used for identification the same as fingerprints. The only reason it is not as widespread as fingerprints is largely due to logistics such as computer processing.