New Jersey Statutes Title 3B. Administration of Estates Decedents and Others 3B § 3-48

a. Adopted individuals and individuals born out of wedlock, and their respective descendants if appropriate to the class, are included in class gifts and other terms of relationship in accordance with the rules for intestate succession. Terms of relationship that do not differentiate relationships by the half blood from those by the whole blood, such as “brothers,” “sisters,” “nieces,” or “nephews,” are construed to include both types of relationships.

b. In addition to the requirements of subsection a., in construing a donative disposition by a transferor who is not the natural parent, an individual born to the natural parent is not considered the child of that parent unless the individual lived while a minor as a regular member of the household of that natural parent or of that parent's parent, brother, sister, spouse or surviving spouse.

c. In addition to the requirements of subsection a., in construing a dispositive provision by a transferor who is not the adoptive parent, an adopted individual is not considered the child of the adoptive parent unless the adopted individual lived while a minor, either before or after the adoption, as a regular member of the household of the adoptive parent.