closely related by blood

handed down in a direct line from the founder

born of the wife (i.e. not of a concubine)

having the same paternal grandfather but different father

son, esp. the eldest son, of the wife (contrasted with 庶子[shu4 zi3])

father's wife (term used by the children of a concubine to address their father's primary wife)

direct line of descent; under one's personal command; school or faction passing on faithfully one's doctrine