When I started reading these newspapers I was surprised to see that at that time, Sainsbury’s was not a food store but sold clothes and linen and other such items.
If you read the Sainsbury’s website, it seems that Sainsbury’s was founded in 1869 by John James Sainsbury and his wife Mary Ann, who set up a small store selling milk with scrupulous care of hygiene and quality of food. The link below is quite interesting.
Perhaps there was more than one brother. If anyone knows more on this subject do share it with us.