Seeing as how you have asked specifically for a family tent, I will assume that you are not needing a backpacking tent or one for harsh environments. If your children are older then maybe you are thinking of some more extreme campouts, and in this case you will need to spend more money...and perhaps look at a Kelty tent, or a Eureka tent.
Assuming that you are not looking for more than a summer time tent, you have many more options and can go with a Northwest Territory tent from Kmart or Sears, or maybe even a Coleman camping tent for a few extra bucks.
Now comes the question of the size of your family...you should always divide the recommended capacity in half, so if a tent is supposedly a 6-person model, you should expect it to fit 3 adults and some gear.
One of the tents that I have had my eye on is the Coleman Sundome 10' X 10' dome tent, here is a link to an article about it.
This would be a great tent for 4 people, but if you have a larger family you might need to look at other models or two tents for your family.