The aim of the submitted thesis is to give an overall picture of the demographic structure of the population of the Chrudim region after the end of the Thirty Years War as recorded in the List of Serfs according to Faith of 1651. Each individual was listed according to name, occupation or relationship to household head, age and religious status. The List recorded 46 626 persons of the Chrudim region. This List did not avoid the rounding-off the age of the people and failed to record consistently the infant part of the population. One of the main aims is to provide an estimate of the child component of the population. The basic prerequisite for estimating the number of children under the age of 12 was that women (men) of the same age in various parts of the estates had on average the same or at least a similar number of children in the individual age groups. Mathematical models eliminating rounding the age of the people consist in formalisation of thinking the way people could rounding their age. One possibility is hypothesis that closer their real age was to some favourite age (multiples 10, 5, even numbers) so much the more they rounded their age for this favourite values. Another possibility presents hypothesis of uniform tendency to rounding within the frame of determinate interval. The last...