Sach Family History
Sach Name Meaning
from Middle English sak sach ‘sack sackcloth’ probably a name given to someone who wore an undergarment of sackcloth as a sign of mourning or as a penance or perhaps given to a maker of sacks or sackcloth (compare Sacker ). Judging by the Essex evidence the two Middle English forms were taken as equivalent and interchangeable.
Source: The Oxford Dictionary of Family Names in Britain and Ireland, 2016