If your family name is known for honesty and good work, then use the name. Be careful, for example in my town there is a contractor with a less than perfect reputation. His brothers are also in construction, and they use their names as business names. There is a lot of confusion on which brother is the "bad" one.
I have to think that the 2 "good" brothers don't understand that their brother has a bad rep, why would they? So they miss out on some business from a confused market.