A word-nerd like me enjoys reading books on etymology (the origins of words and language). I recently came across the origins of the words "Lord" and "Lady", and thought I'd pass it along. This will perhaps help explain why I use these titles for my deities instead of fixing a name upon Them.
Lord
Bread was literally "the staff of life" for centuries. When the grain crop was good, people grew fat and prosperous; when it was bad, they grew thin and starved. Hence, community and family life revolved around bread.
In Anglo-Saxon households the most powerful male was responsible for guarding the bread supply. He even had a formal title, hlafweard ("loaf keeper"). This gradually contracted and emerged into modern English as lord.
Lady
In Anglo-Saxon times most families were quite large, so there was much work to be done around the household. Custom decreed that special tasks should be allotted to various female members of the group.
Unmarried girls usually looked after such matters as milking and spinning. But the privilege of making bread, one of the most important items of the diet, was reserved by the housewife herself. She was called the lae-dige, meaning "the bread kneader." Later centuries modified the term to lady. Etymologically speaking, no woman is entitled to be called a lady until she has learned to make bread!
Citation:
Garrison, Webb. 445 Fascinating Word Origins. New York: Galahad Books, 2000.