This study brings forth the findings concerning the population of Tar, Vabriga and Frata, the three villages which united under the same parish in 1847. The data from the register forms an important historical source, and can also help in understanding the demographics of the time, as well as provide a window into multiple layers of life in the said area. At the beginning of the study, one can find the historical overview of how the registers were kept, a short history of the Tar, Vabriga and Frata villages, and an analysis of the various migrations of the local people, drawing on the information found in the registers. The main focus is on the children born out of wedlock in these areas during the 18th and 19th century. Particular attention is given to the ratio of such children in the overall population of children, which is then compared to other places in Istria, and to the number of births and conceptions in particular seasons. Other important aspects include the number of legitimated children according to the registers, personal names and symbols used for children born out of wedlock, the choice of godfathers, and how these children were treated by their parents and community at large. Also analyzed were the mothers, particularly who they were and how the community treated them. Lastly, a couple of lines deal with the midwives, who had very important roles in the society of that period.