Kinship and descent

The one-drop rule is a social and legal principle of racial classification that was historically prominent in the United States asserting that any person with even one ancestor of sub-Saharan-African ancestry ("one drop" of black blood) is considered black (Negro in historical terms).

The concept of nurture kinship in the anthropological study of human social relationships (kinship) highlights the extent to which such relationships are brought into being through the performance of various acts of nurture between individuals.

Consanguinity ("blood relation", from the Latin consanguinitas) is the property of being from the same kinship as another person.

(For other uses, see Husband (disambiguation).) A husband is a male in a marital relationship.

Matrilineality is the tracing of descent through the female line.

Race is the classification of humans into groups based on physical traits, ancestry, genetics or social relations, or the relations between them.

A wife is a female partner in a continuing marital relationship.

Borjigin (plural Borjigid; Mongolian: Боржигин, Borjigin; Борджигин, Bordjigin; Mongolian script: , Borjigit), is the last name of the imperial clan of Genghis Khan and his successors.

A godparent, in many denominations of Christianity, is someone who sponsors a child's baptism, although the term has also been used in a legal sense.

Inbreeding is the production of offspring from the mating or breeding of individuals or organisms that are closely related genetically.

("Siblings" redirects here. For other uses, see Siblings (disambiguation).)("Half-sister" and "Half sisters" redirect here. For the television series aired on GMA Network, see The Half Sisters.) A sibling is one of two or more individuals having one or both parents in common.

Child protection refers to the protection of children from violence, exploitation, abuse and neglect.

Legitimacy, in Western common law, has traditionally referred to the status of a child born to parents who are legally married to each other; and of a child conceived before the parents obtain a legal divorce.

A progenitor is a person or thing from which others are descended or originate.

In evolutionary psychology, the Cinderella effect is the alleged higher incidence of different forms of child-abuse and mistreatment by stepparents than by biological parents.

Eskimo kinship is a category of kinship used to define family organization in anthropology.

In law, a prohibited degree of kinship refers to a degree of consanguinity (blood relatedness) between persons that results in certain actions between them becoming illegal.

Fictive kinship is a term used by anthropologists and ethnographers to describe forms of kinship or social ties that are based on neither consanguinal (blood ties) nor affinal ("by marriage") ties, in contrast to true kinship ties.

A lineage is a unilineal descent group that can demonstrate their common descent from a known apical ancestor.

The recorded genealogy of the British Royal Family traces back to the early Middle Ages.

Milk kinship, formed during nursing by a non-biological mother, was a form of fostering allegiance with fellow community members.