ORS 112.185

For all purposes of intestate succession, a person who has been adopted more than once shall be treated as the child of the parents who have most recently adopted the person and, except as otherwise provided in this section, shall cease to be treated as the child of the previous adoptive parents. The person shall continue also to be treated as the child of a previous parent or previous adoptive parent other than the most recent adoptive parents only to the extent provided in ORS 112.175 (2), and for the purpose of applying that subsection with reference to a previous adoptive parent, “parent” in that subsection means the previous adoptive parent.