Schwiegervater

the origin or background of a person in terms of family or nationality.

To adopt; to legally take another's child as one's own.

Having been adopted, legally taken as one's own child.

the legal process of becoming the parent of a child not biologically one's own.

adoptive parents

adopted child

a person from whom one is descended, especially if more remote than a grandparent.

An ancestor or forefather.

To look or be like someone or something else.

Ancestors; a person, typically one more remote than a grandparent, from whom one is descended.