The symbol for family and home is 家 and depicts a pig under a roof.
Pigs were kept around houses of Chinese Country men and even inside them (the houses not the countrymen). It's suggested that pigs (and dogs) were used to keep the streets clean.
In Chinese there is a special name for older brothers and sisters and younger brothers and sisters as well as for relatives on the fathers side and for the mothers side. And so simply by listening to how family members address each other it is possible to ascertain relationships.
The general term for brothers and sisters is
while younger brother is
Younger sister is
and older sister is
Father and mother is
父親 and mother is
and mother (or mum) is