A religious denomination is a subgroup within a faith distinguished by common doctrine, tradition, and identity. From Christianity’s Catholic and Protestant branches to Islam’s Sunni and Shia sects, denominations illustrate both unity and division within religious communities. Authors such as Isabella L.
Bird observed the variety of denominations, while Frederick Marryat focused on the commonalities among Christian groups. A. H. Newton emphasized that no single denomination asserts exclusive religious truth, underscoring the range of beliefs and practices. These viewpoints reveal denominations as both sources of division and shared spiritual goals.