Relater

noun

1. One who relates, or tells; a relater or narrator.
2. One who relates, associates, or links things together.
3. A private person at whose relation, or in whose behalf, the attorney-general allows an information in the nature of a quo warranto to be filed.
4. An expression of the identity element of a group as a product of generators, used in a presentation (type of specification) of the group.