Who did a pharo's son have to marry?

A pharaoh's son typically had to marry a woman from the royal family to maintain the purity of the bloodline and ensure the continuation of the dynasty. This often meant marrying a sister or cousin, as it was believed that such unions would strengthen the family's claim to the throne and uphold their divine status. In some cases, the marriage could also include alliances with powerful nobles or foreign royalty to consolidate power.