"Family" means one individual or a number of individuals related by blood, adoption, or marriage to the head of the household or to the spouse of the head of the household, and/or other relationships as provided hereafter, living as a single housekeeping unit in a single dwelling unit, but limited to the following:
(a) Husband or wife of the head of the household.
(b) Children of the head of the household or of the spouse of the head of the household, provided each such child has no spouse or children residing with him or her.
(c) Father, mother, grandfather and grandmother of the head of the household, or of the spouse of the head of the household.
(d) A family may include those persons described in subsection (d)(1), (2) and (3) hereof, so long as such combination does not exceed two additional persons:
(1) Not more than one dependent married or unmarried child of the nominal head of the household or of the spouse of the nominal head of the household and the spouse and dependent children of such child. For the purpose of this subsection, a dependent child is one who has more than fifty percent (50%) of his total support furnished for him, his spouse and children, by the nominal head of the household and the spouse of the nominal head of the household, or
(2) Not more than two additional persons not included within subsections (a) through (c) hereof, whether or not related in any manner to the head of the household or to the spouse of the household, provided such persons are at least eighteen years of age, or
(3) Not to exceed two persons under eighteen years of age for whom the head of the household or the spouse of the head of the household, or a member of the family related by blood to such minor or minors, has been appointed the legal guardian by a court of competent jurisdiction.
(e) A family may consist of one individual.
(f) One person shall be designated as head of the household who shall be that person who customarily furnishes the greater percentage of financial support to the maintenance of the family.