Iziduko (pl.) in Xhosa are family names that are considered more important than surnames among Xhosa people. Many Xhosa persons can trace their family history back to a specific male ancestor or stock. Mentioning the clan name of someone is the highest form of respect, and it is considered polite to enquire after someone's clan name on meeting. The clan name is also sometimes used as an exclamation by members of that clan.