Much like lord, as covered before, lady has connotations with bread. Lady is derived from loaf maid – hlāf, dīġe.
Dīġe is related to dæge, meaning maker of dough, giving the word Lady a double bread-y origin. This dæge root is also the source of the first part of dairy. It comes from Proto-Germanic *daigjon, meaning a female servant or maid, source of Swedish deja meaning a dairy maid. Ultimately this derives from the PIE *dheigh- meaning to form or build.
This PIE root is attested through the Sanskrit word for body – dehah – literally that which is formed.
A lord then is the keeper or warden of the bread, while a lady is the kneader, or former, of the bread.