See Definition for fulh 5443
See Definition for patria 3965
See Definition for oikov 3624
These words form a series. fulh is sometimes a race, nation,
but usually a tribe, such as one of the twelve tribes of Israel,
descended from the twelve sons of Jacob.
patria is a smaller division within the tribe, it's an association
of families closely related, in the N.T. generally used of those
descended from a particular one of the sons of Jacob's sons.
oikov is yet narrower, household, including all the inmates of
a single house, being the unit of organization.