Thetis, in the Greek mythology the daughter of Nereus (q.v.) and Doris, who being married against her will to Peleus, became the mother of Achilles; she was therefore a Nereid (q.v.), and gifted with prophetic foresight.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Thetford * Theuriet, André