Zerah is a biblical figure mentioned in the Book of Genesis. He is one of the twin sons of Judah and Tamar, making him a part of the lineage of the Israelites. Zerah's twin brother is Perez, and their birth is notable for the unusual circumstances surrounding it, as Zerah's hand emerged first during childbirth. In the genealogical records, Zerah is recognized as an ancestor of the Zerahites, a clan within the tribe of Judah. His descendants are listed in various biblical texts, highlighting the importance of family lineage in ancient Israelite culture.