From the AHD:

brawn
n.
Solid and well-developed muscles, especially of the arms and legs.
Muscular strength and power.
Chiefly British The meat of a boar.
Headcheese.

[Middle English, muscle, from Old French braon, meat, of Germanic origin; see bhreu- in Indo-European roots.]

This same Indo-European Root, bhreu, underlies both breed, brew and bread:

bread      
       
NOUN:      1. A staple food made from flour or meal mixed with other dry and liquid ingredients, usually combined with a leavening agent, and kneaded, shaped into loaves, and baked. 2a. Food in general, regarded as necessary for sustaining life: “If bread is the first necessity of life, recreation is a close second” (Edward Bellamy). b. Something that nourishes; sustenance: “My bread shall be the anguish of my mind” (Edmund Spenser). 3a. Means of support; livelihood: earn one’s bread. b. Slang Money.       
TRANSITIVE VERB:      Inflected forms: bread·ed, bread·ing, breads
To coat with bread crumbs, as before cooking: breaded the fish fillets.       
ETYMOLOGY:      Middle English, from Old English brad. See bhreu- in Appendix I. N., sense 3b, possibly from Cockney rhyming slang bread and honey.

AHD.

It’s interesting, this connection between meat, and bread as a morsel of food. In Hebrew ‘bread’ is lehem—see Agoraphile’s post:

....The Hebrew word l-kh-m means both ‘bread’ and the notion of ‘coming together in order’. This latter meaning is found in the Hebrew words for ‘solder’ halkhama and ‘fighting in battle,’ and hence also the word for ‘war’ milkhama….

,
and in Arabic, the same word (pronounced a bit differently) means, not bread, but ‘meat’!

norio

thoughts before lunch