The Doctrine of the Trinity teaches that within the unity of the one Godhead there are three separate persons who are coequal in power, nature, and eternity.

Walter Martin may refer to:
Walter Ralston Martin (1928–1989) American Evangelical minister author and Christian apologist
Walter Martin (rugby union) (1883–1933) Wales international rugby union player
Walter Martin (cyclist) (1891–?) American road racing cyclist
Walter Martin half of artists Martin & Muñoz
Gen. Walter Martin House a historic home located at Martinsburg in Lewis County New York
Walter Stillman Martin Christian minister and husband of Civilla D.