A "fraternal relationship" refers to a close bond between two or more individuals who share a similar, brotherly connection. Like siblings or close friends, they show care, support, and understanding towards each other. Full definition
He hopes the Anglicans will listen and that «good fraternal relationships between us will revive». (faith.org.uk)
Furthermore, since 1973, during my work as liaison between the Presbyterian Church (U.S.A.) and partner churches in Latin America and the Caribbean, and in the last few years as Area Coordinator for South America, the denomination I represent has had fraternal relationships with some Pentecostal churches in the region. (religion-online.org)
Schmidt (2008) investigated the characteristics of coparenting relationships, the family adaptation and the occurrence of aggressive behaviors in fraternal relationships of teenagers diagnosed with autism. (interpersona.psychopen.eu)