Where does “leatherfish” come from?

leatherfish (English) comes from English leather, from English stocking, from English -ing, from Old English -ing, from Old English -tūn, from Old English tūn, from Proto-West Germanic tūn, from Proto-Germanic tūną — smoke; mist, haze.

Ancestry of “leatherfish”, step by step

leatherfish traces back through two separate lines of ancestry.

via English leather

StepLanguageWordMeaning
1EnglishleatherA tough material produced from the skin of...
2EnglishstockingA soft garment, usually knit or woven, worn on...
3English-ingUsed to form gerunds, a type of verbal nouns,...
4Old English-ingForming nouns from verbs, indicating action,...
5Old English-tūnhomestead, village, town
6Old Englishtūnenclosure, yard; place; dwelling
7Proto-West Germanictūnfence
8Proto-Germanictūnąfence; enclosure
9Gaulishdunumfort; hill, hillfort
10Proto-Celticdūnomstronghold, rampart
11Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via English Fish

StepLanguageWordMeaning
1EnglishFishThe constellation and zodiacal sign Pisces
2Old Englishfiscianto fish
3Proto-West Germanicfiskōnto fish, to catch fish
4Proto-Germanicfiskōnąto fish, to catch fish
5Proto-Germanic-ōnąCreates denominative verbs from nouns; Creates...
6Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
7Proto-Indo-European-yétiCreates intransitive, often deponent,...
8Proto-Indo-Europeanyé-
9Chichewaiyehe, she
Every word from Proto-Indo-European dʰewh₂-