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Reverend

Use the with full name:
            the Reverend Allen T. Carroll

If the title is abbreviated, it is not necessary to use the:
            Rev. Allen T. Carroll

Do not use Reverend or Rev. with only the surname:
            Write     Mr. Carroll or Dr. Carroll
            not          the Reverend Carroll or Rev. Carroll

Formal usage:
            the Reverend Mr. (or Dr.) Allen T. Carroll is acceptable

See also CLERGY.