
Henogamy is a social custom allowing exactly one of the children (or male children) in a family to marry. Henogamy typically exists in order to preserve family property. It is practised by the Nambudiri Brahmin caste in the state of Tamil Nadu, India. ...
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http://en.wikipedia.org/wiki/Henogamy

the custom by which one, and only one, member of a family is permitted to marry. The classic example is that of the patrilineal Nambdiri Brahmans of ...
Found on
http://www.britannica.com/eb/a-z/h/37
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