Parental:
* Childless: Lacking children.
* Non-parental: Not related to or involving parents.
* Independent: Self-reliant, not requiring parental guidance.
Paternal:
* Maternal: Relating to the mother.
* Non-paternal: Not relating to the father.
Maternal:
* Paternal: Relating to the father.
* Non-maternal: Not relating to the mother.
Family:
* Solitary: Living alone, without a family.
* Individual: A single person, separate from a family.
Ancestral:
* Modern: Relating to the present or recent times, not the past.
* Contemporary: Existing or happening now.
Linear:
* Branching: Splitting into multiple lines or paths.
* Non-linear: Not following a straight line, often unpredictable.
Patriarchal:
* Matriarchal: A society ruled by women.
* Egalitarian: A society where men and women have equal rights and opportunities.
Collateral:
* Direct: Involving a direct line of descent.
* Linear: Following a single line, without branches.
Descent:
* Ascent: A movement upward, or the process of rising to a higher position.
* Origin: The beginning or starting point.
Important Note:
It's worth noting that some of these terms are complex and have different shades of meaning depending on the context. This list provides a general sense of antonyms, but it's always a good idea to consider the specific usage when choosing a word.