My chow mix was raised with a young daughter, an older dog, and a dane mix of the same age. He died of old age at about 13 years old.
He was good with cats and ferrets too.
I think the key is good socialization. If you have kids let them get in on training and giving treats too.
My chow did start getting a little grumpy at about 12, but that was due to arthritus. And he never attempted to bite anyone.
I wouldn't worry about what breeds may or may not be present, just socialize, socialize, socialize, and do some research on proper training... You should be fine!
Best wishes! I am sure she will make a great family dog. And spaying at the earliest age your vet reccommends will help too. My chow mix was neutered at six months and never developed some unwanted behaviours usually associated with maturity.