 Some critics, however, view this as a postdiction, an eponymous metaphor providing an aetiology of the connectedness of the tribe to others in the Israelite confederation In the Biblical account, Joseph is one of the two children of Rachel and Jacob, a brother to Benjamin, and father to both Ephraim, and his first son, Manasseh; Ephraim received the blessing of the firstborn, although Manasseh was the eldest, because Jacob foresaw that Ephraim's descendants would be greater than his brother's.Here the blessing of the first son was conferred by a grandfather rather than by the father, despite prevailing custom (great patriarchs supersede custom).Though the biblical descriptions of the geographic boundary of the House of Joseph are fairly consistent, the descriptions of the boundaries between Manasseh and Ephraim are not, and each is portrayed as having exclaves within the territory of the other.