Marriage register books are documents that were used for centuries by ecclesiastical institutions to register marriages. Most of these books were handwritten. These documents have interesting information, useful for demography studies. The information in these books is usually collected by expert demographers that devote a lot of time to transcribe them. The automatic transcription of these documents by using Handwritten Text Recognition techniques is difficult since the vocabulary is large, given that it is composed mainly of proper names. In this work, interactive Handwritten Text Recognition techniques were studied for the assisted transcription of these documents.