I'll be doubledipped in dogdoodoo, I just know happened on etymology of "inch"
From L. uncia, a twelfth part.
5ME inche < OE ynce < L uncia, twelfth part, inch, OUNCE16
1 a unit of linear measure equal to ! foot (2.54 centimeters): symbol, t (e.g., 10t): abbrev. in
2 a fall (of rain, snow, etc.) equal to the amount that would cover a surface to the depth of one inch
3 a unit of pressure as measured by a barometer or manometer, equal to the pressure balanced by the weight on a one-inch column of liquid, usually mercury, in the instrument
4 a very small amount, degree, or distance; trifle; bit
vt., vi.
to move by inches or degrees; move very slowly
every inch in all respects; thoroughly
inch by inch gradually; slowly; by degrees: also by inches
within an inch of very close to; almost to
within an inch of one‘s life almost to one‘s death

inch2 7in)8
5ME < Gael innis, island6 in Scotland and Ireland, an isolated piece of land, as a small island or hill