Definition of "Frig"

The cult of the fertility goddess Frig is sufficiently proved by the occurrence of her name in the Old English Frigedæg, the modern Friday. But no place of her worship has yet been identified with complete certainty, and her name was not used in the formation of English personal names. Seaxneat, the ancestor of the kings of Essex, was presumably honoured by their subjects, though the place-names which arose among them contain no trace of him. But Woden, Thunor, Tiw, and Frig are the only deities whose individualized worship in England is beyond dispute.

1943, F[rank] M[erry] Stenton, Anglo-Saxon England, Oxford, Oxon: At the Clarendon Press, page 98

Alternatively, this group might consist of the goddess Frig, associated with two other female deities (possibly Eostre and Hretha?) – but we cannot be certain that the Anglo-Saxons worshipped Frig.

2009, Marilyn Dunn, The Christianization of the Anglo-Saxons c.597–c.700: Discourses of Life, Death and Afterlife, Continuum, published 2010, page 63

Mighty God Woden, Merciful Goddess Frig, before me stand two people who have come of their own free will to break the bonds that made them as one. […] I cleanse these rings in the name of Woden and Frig.

2011, Bruce K. Wilborn, Witches’ Craft: A Multidenominational Wicca Bible, Skyhorse Publishing