god-sibling

Noun

godsibling (plural godsiblings)

1. A child, or fellow godchild, of one's godparent, or a godchild of one's parent: a person with whom one has a sibling relationship that is mediated or created by a godfamily tie rather than blood relation.
   • Ines described her first godfather as so controlling that he didn't permit his godchildren to talk with each other. She believed that he had coercive sexual relationships wth many of her godsiblings.2016, C. Lynn Carr, A Year in White: Cultural Newcomers to Lukumi and Santería in the United States, Rutgers University Press, →ISBN