jia has two components . The first component is 'shelter' or 'roof' and the second component is the hieroglyph of 'pig' (the nose is pointing upwards with legs on the left side). Pork is an important source of protein and in ancient times people raised pigs in their homes.
jiaren means 'family' and literally translates as 'home'-'people'.
ren is actually a stick figure of a walking person and means 'man', 'people' or 'humanoid'.
jiazu means 'family clan' and literally translates as 'home'-'cluster'.
zu has two components . The first component is a hieroglyph and means 'flag'. The second component is shi which means 'arrow'. Arrows that all hit the target flag make up a cluster.