With the aid of Mongoyuhae it is possible to reconstruct the Mongolian terminology that was used to identify kin members in the eighteenth century and earlier. As shown in Mongoyuhae, according to the system of the eighteenth century, Mongolian kinship extends for nine generations, from four generations previous to ego and to the four generations after ego. This kinship system shows these nine generations in a vertical line, beginning at the top with the founder of the kin group (töröl övög), and extending through the nine generations of the patrilineal line from the great great grandfather (hulants övög) to the great great grandson (guch). In the eighteenth century, paternal uncles and aunts(the father's siblings) were terminologically differentiated from their maternal counterparts. Whereas kin terms for affinal kinsmen demonstrate some of the characteristics of eighteenth century Mongolian kinship. The use of kin terms in what we might call the “descriptive mode” is visible in some cases. In addition, there was a tendency in eighteenth century Mongolian society to employ elaborate kin terms such as hüü, ach, jich and guch patrilineal descendants (e.g., son, grandson, great grandson and great great grandson). This tendency suggests that Mongolian society at that period had a strong sense of patrilineal descent than it does now.