My entire family and I pretty much all have brown hair. I don't know how strong of a gene it is but I'm happy I have it!
Yes there is lot of brown hair in my family too, and after all it is the second most common hair color after black hair..
I had no idea that was a fact. I can definitely believe it though. Not a personal fan of black hair. 
People with brown hair are often referred as brunette.  That comes from the French term of brun, meaning brown.