Sarah the Priestess, pg 14 For the kings, to whom patriliny was the norm, descent was traced through the male line, so Sarah and Abram, both being the offspring of one father, Terah, are brother and sister. In Sarah’s society, however, patriliny was not the custom… In matriliny, descent is traced through the mother; and since… [Abram] and Sarah had different mothers, they would not be considered siblings… It is for this reason that they were permitted to be married.
Sarah the Priestess, pg 14
For the kings, to whom patriliny was the norm, descent was traced through the male line, so Sarah and Abram, both being the offspring of one father, Terah, are brother and sister. In Sarah’s society, however, patriliny was not the custom… In matriliny, descent is traced through the mother; and since… [Abram] and Sarah had different mothers, they would not be considered siblings… It is for this reason that they were permitted to be married.
edit delete