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Reproducing or republishing an article, in whole or in part, in any other forum requires permission of the author or the moderator. Choosing a new name unrelated to the existing congregations is probably a wise idea. That way neither group feels disappointed at taking second billing. In addition, you avoid the long and awkward names so common among merged congregations. When I lived in Chicago, my home was near a congregation that had been through at least two mergers over its long history.