The term 'One of the Family' can be represented by several different crossword solutions. The five solutions are niece (5 letters), SISTER (6 letters), RELATIVE (8 letters), KINSMAN (7 letters) and SIB (3 letters) and SIS (3 letters). Niece and SISTER refer to female family members, while RELATIVE, KINSMAN and SIB/sis refer to any family member regardless of gender. All of these terms refer to a person who is part of a family unit, either by blood or marriage.