spiritual relationship between child's parents and godparents
• (n.) The relation of a godfather to a person.
Com`pa·ter'ni·ty noun [ Late Latin compaternitas , from compater godfather; com- + pater father.] The relation of a godfather to a person. [ Obsolete] « The relation of gossipred or compaternity by the canon law is a spiritual affinity. Sir J. Davies.
compaternity The relationship which exists between godfathers (or both godparents) mutually, or between them and the actual parents of a child.
the relationship between the godparents of a child or between the godparents and the child's parents.