←
Ancient Greek σφίδη (derived)
←
Proto-Indo-European *bʰeydʰ- (derived)
→
Dalmatian faid (inherited)
→
Esperanto fido (derived)
→
Italian fede (inherited)
→
Norman fouai (inherited)
→
Old Occitan fe (inherited)
→
Portuguese fé (inherited)
→
Old Portuguese fe (inherited)