The youngest sibling was so much of his past and he had been accustomed to him without major aversion.
"Corpus of a Siam Mosquito"
Steven Sills
It was defined as marrying or having carnal knowledge of one's grandparent, parent, sibling, mother's brother or sister, father's wife, mother's husband, son's wife, daughter's husband, wife's mother or daughter, or husband's father or son.
"Our Legal Heritage, 4th Ed."
S. A. Reilly
The extended family groupings in terms of matrilocal residence or centered around a sibling group are amorphous but flexible.
"Shoshone-Bannock Subsistence and Society"
Robert F. Murphy Yolanda Murphy