Hi,

According to the Global Egyptian Museum, Hemiunu has the title “ "[4] Eldest of the Palace, 'Greatest of the Five' (in) the House of Thoth, who loves his lord, the Sole Friend".
Ankhhaf also has a similar title: "King's son of his body, chief justice and vizier, greatest of the five of the House of Thoth".

I am looking for some background as to the meaning of these titles.

Thanks,
Brendan