A saint after my own heart.

St. Minutia, an 8th-century nun born in a region of what later became the Czech Republic, whose motto was:

Non pilus tam tenuis ut secari non possit.

Translation:  "No hair is too fine to be split."

More details on her life at this site, including that she is known (appropriately enough) as the Patron Saint of Cataloguers -- details which, like so much other historical information about the Middle Ages and the so-called "Dark Ages", exposes such mythologizing as the historically illiterate slander of Moderns (who began their scurrilous revisionism in this regard in earnest as long ago as the vaunted Renaissance).