Problems with relative dating
Broadly, kinship patterns may be considered to include people related by both descent – i.e.social relations during development – and by marriage.The major patterns of kinship systems that are known which Lewis Henry Morgan identified through kinship terminology in his 1871 work Systems of Consanguinity and Affinity of the Human Family are: The six types (Crow, Eskimo, Hawaiian, Iroquois, Omaha, Sudanese) that are not fully classificatory (Dravidian, Australian) are those identified by Murdock (1949) prior to Lounsbury's (1964) rediscovery of the linguistic principles of classificatory kin terms.In many societies where kinship connections are important, there are rules, though they may be expressed or be taken for granted.Different societies classify kinship relations differently and therefore use different systems of kinship terminology – for example some languages distinguish between affinal and consanguine uncles, whereas others have only one word to refer to both a father and his brothers.Kinship terminologies include the terms of address used in different languages or communities for different relatives and the terms of reference used to identify the relationship of these relatives to ego or to each other.
In most societies it is the principal institution for the socialization of children.
With matrilineal descent individuals belong to their mother's descent group.
Matrilineal descent includes the mother's brother, who in some societies may pass along inheritance to the sister's children or succession to a sister's son.
the difference between a mother and a childless woman).
Degrees of relationship are not identical to heirship or legal succession.