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Kinship terminology is the systems used in languages to refer to the persons to whom an individual is related through kinship. 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. ==Historical view== Anthropologist Lewis Henry Morgan (1818–1881) performed the first survey of kinship terminologies in use around the world. Though much of his work is now considered dated, he argued that kinship terminologies reflect different sets of distinctions. For example, most kinship terminologies distinguish between sexes (the difference between a brother and a sister) and between generations (the difference between a child and a parent). Moreover, he argued, kinship terminologies distinguish between relatives by blood and marriage (although recently some anthropologists have argued that many societies define kinship in terms other than blood). However, Morgan also observed that different languages (and, by extension, societies) organize these distinctions differently. He proposed to describe kin terms and terminologies as either descriptive or classificatory. When a descriptive term is used, it can only represent one type of relationship between two people, while a classificatory term represents one of many different types of relationships. For example, the word ''brother'' in English-speaking societies indicates a son of the same parent; thus, English-speaking societies use the word ''brother'' as a descriptive term. But a person's male first cousin could be the mother's brother's son, mother's sister's son, father's brother's son, father's sister's son, and so on; English-speaking societies therefore use the word ''cousin'' as a classificatory term. Morgan discovered that a descriptive term in one society can become a classificatory term in another society. For example, in some societies, one would refer to many different people as "mother" (the woman who gave birth to oneself, as well as her sister and husband's sister, and also one's father's sister). Moreover, some societies do not group together relatives which the English-speaking societies classify together. For example, some languages have no one-word equivalent to ''cousin'', because different terms refer to mother's sister's children and to father's sister's children. Armed with these different terms, Morgan identified six basic patterns of kinship terminologies: *Hawaiian kinship: the most classificatory; only distinguishes between sex and generation. Thus, siblings and cousins are not distinguished (the same terms are used for both types of relatives). *Sudanese kinship: the most descriptive; no two types of relatives share the same term. Siblings are distinguished from cousins, and different terms are used for each type of cousin (i.e. father's brother's children, father's sister's children, mother's sister's children and mother's brother's children). *Eskimo kinship: has both classificatory and descriptive terms; in addition to sex and generation, it also distinguishes between lineal relatives (those related directly by a line of descent) and collateral relatives (those related by blood, but not directly in the line of descent). Lineal relatives have highly descriptive terms; collateral relatives have highly classificatory terms. Thus, siblings are distinguished from cousins, while all types of cousins are grouped together. The system of English-language kinship terms falls into the "Eskimo" type. *Iroquois kinship: has both classificatory and descriptive terms; in addition to sex and generation, it also distinguishes between siblings of opposite sexes in the parental generation. A genealogical relationship traced through a pair of siblings of the same sex is classed as a blood relationship, but one traced though a pair of siblings of the opposite sex can be considered an in-law relationship. In other words, siblings are grouped together with parallel cousins, while separate terms are used for cross-cousins. Also, one calls one's mother's sister "mother" and one's father's brother "father". However, one refers to one's mother's brother and one's father's sister by separate terms (often the terms for "father-in-law" and "mother-in-law", since cross-cousins can be preferential marriage partners). *Crow kinship: like Iroquois, but further distinguishes between mother's side and father's side. Relatives on the mother's side of the family have more descriptive terms, and relatives on the father's side have more classificatory terms. Thus, Crow kinship is like Iroquois kinship, with the addition that a number of relatives belonging to one's father's matrilineage are grouped together, ignoring generational differences, so that the same term is used for both one's father's sister and one's father's sister's daughter, etc. *Omaha kinship: like Iroquois, but further distinguishes between mother's side and father's side. Relatives on the mother's side of the family have more classificatory terms, and relatives on the father's side have more descriptive terms. Thus, Omaha kinship is like Iroquois, with the addition that a number of relatives belonging to one's mother's patrilineage are grouped together, ignoring generational differences, so that the same term is used for both one's mother's brother and one's mother's brother's son, etc. The basic principles of Crow and Omaha terminologies are symmetrical and opposite, with Crow systems having a matrilineal emphasis and Omaha systems a patrilineal emphasis. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kinship terminology」の詳細全文を読む スポンサード リンク
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