Is there a basis in halacha for the oldest son of a Rov or Rebbe to inherit his father’s position? And does halacha differntiate between a b’chor and an eldest son who has an older sister? If there are no sons, does a son-in-law have a claim? And what are the exceptions to the rule, if any?
(All of the above assumes there is no will specifying a succesor.)
When there are conflicts among children as to who will inherit the position (and there is no disputed will), how can a younger son claim to inherit before his older brother?