We have seen that the prohibitions against incest are very often more or less one-sided, applying more extensively either to the relations on the father’s side or to those on the mother’s, according as descent is reckoned through men or women. We have also seen that the line of descent is intimately connected with local relationships; and we may now fairly infer that the same local relationships exercise a considerable influence on the table of prohibited degrees. Among the Rejangs of Sumatra, says Marsden, a marriage must not take place between relations within the third degree; “but there are exceptions for the descendants of females who, passing into other families, become as strangers.”[1958] A Chinese woman, on marriage, alienates herself from her own family to be incorporated into that of her husband; hence, as Mr. Medhurst observes, children of brothers and sisters may marry at pleasure, while those of brothers cannot be united on pain of death.[1959] In a large number of cases, prohibitions of intermarriage are only indirectly influenced by the close living together. Aversion to the intermarriage of persons who live in intimate connection with each other has provoked prohibitions of the intermarriage of relations; and, as kinship is traced by means of a system of names, the name comes to be considered identical with relationship. This system, as Dr. Tylor remarks,[1960] is necessarily one-sided. Though it will keep up the record of descent either on the male or female side, it cannot do both at once. The other line, not having been kept up by such means of record, even where it is recognized as a line of relationship, is more or less neglected, and is soon forgotten; hence the prohibited degrees often extend very far on the one side, but not on the other. We have seen many instances of a common surname being a bar to intermarriage. This is especially the case with peoples among whom the clannish feeling is highly developed. Thus even the commonest Chinese are often able to trace their descent through lines of ancestry more remote than any that England’s most ancient families can claim.[1961] And, among the Ossetes, a man is bound to take blood-revenge for a cousin a hundred times removed who bears his name, whereas relationship on the mother’s side is not recognized.[1962]