Where does “ring fingernail” come from?

ring fingernail (English) comes from English fingernail, from English finger, from German Finger, from Middle High German vinger, from Old High German fingar, from Proto-West Germanic fingr, from Proto-Germanic fingraz, from Proto-Indo-European penkʷrós.

ring fingernail (English): The nail of the ring finger

Definitions

  1. The nail of the ring finger

Ancestry of “ring fingernail”, step by step

ring fingernail traces back through two separate lines of ancestry.

via English fingernail

StepLanguageWordMeaning
1EnglishfingernailThe hard, flat translucent covering near the tip...
2EnglishfingerA slender jointed extremity of the human hand, (often) exclusive of the thumb, and the corresponding part, irrespective of including a thumb, in many other animals
3GermanFingerfinger
4Middle High Germanvingerfinger
5Old High Germanfingarfinger
6Proto-West Germanicfingrfinger
7Proto-Germanicfingrazfinger
8Proto-Indo-Europeanpenkʷrós

via English ring finger

StepLanguageWordMeaning
1Englishring fingerThe finger between the middle finger and the little finger; the "third finger" (UK) or the "fourth finger" (US), especially of the left hand. (The ring finger is the left hand; a ring finger is either hand.)
Every word from Proto-Indo-European penkʷrósEvery word from Proto-Germanic fingrazEvery word from Proto-West Germanic fingr