More on Sansfoy from Infoplease:

• Sansfoy - Sansfoy [Infidelity ]. A Saracen “who cared for neither God nor man,” encountered by ...
• Sansjoy - Sansjoy [Without the peace of God ]. Brother of Sansfoy (Infidelity) and Sansloy (Without the law ...
• Sansloy - Sansloy [Irreligion ], brother of Sansfoy (q.v.). Having torn off the disguise of Archimago and ...
• Dictionary of Phrase and Fable: S - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "S"