Where does “silent fox” come from?

silent fox (English) comes from English silent, from Latin silens, from Latin sileō, from Proto-Indo-European seyl- — still, windless, quiet, slow; to be silent.

Ancestry of “silent fox”, step by step

silent fox traces back through two separate lines of ancestry.

via English silent

StepLanguageWordMeaning
1EnglishsilentFree from sound or noise; absolutely still;...
2Latinsilensresting, ceasing, remaining silent
3Latinsileōto be silent, noiseless, quiet, make no sound; speak not, to be quiet
4Proto-Indo-Europeanseyl-still, windless, quiet, slow; to be silent

via English Fox

StepLanguageWordMeaning
1EnglishFoxSomeone connected with Leicester City Football...
2Middle EnglishfoxA fox or its fur; A lier or schemer
3Old Englishfoxfox
Every word from Proto-Indo-European seyl- →Every word from Latin sileō →Every word from Latin silens →