This book, Genealogy, discusses three main issue, genetics, Druze genetic investigations, and the origin and history of the Druze families. The section on genetics discusses and explains the cells, genes, inheritance, genetic disorders and the purpose of genetic testing. The Druze genetic investigations include national and international research which were carried out in Lebanon, Israel, Saudi Arabia and the Gulf States. The Druze origin is discussed in more details in the third part of the book and includes the hypotheses of their ethnic origins, Arab tribes, the Druze population, and the families. The Druze families, sixty-six of them, are investigated with regards to their origins, history and current residency.