During the Middle Ages, Esztergom and Székesfehérvár used to be the centers of "Italian" (Latin) population of Hungary. Analyzing proprietary relationship of the palace in Esztergom, the author describes kinships of the "Italian" merchants. This story brings out lot of valuable information about the Székesfehérvár townspeople, for example about women and their role in the property affairs. On the background of economic relationship we have the opportunity to have a look at marriage customs of the townspeople.