"There are very few instances of the word bread in Old English, but hlaf [which would later become loaf] appears frequently — and in some interesting combinations. The head of a household was seen as the person who provides bread for all, a hlaf-weard, literally a ‘bread-warden’.
Hlaf-weard changed its form in the 14th century. People stopped pronouncing the f, and the two parts of the word blended into one, so that the word would have sounded something like ‘lahrd’. Eventually this developed into laird (in Scotland) and lord."
The Story of English in 100 Words by David Crystal, on the word loaf