| Style | His/Her/Their Majesty |
| First Holder | Marka II Kazimir |
| Current Holder | Verinka I Kazimir |
| Residence | The Sunfort |
| Appointer | Hereditary, absolute primogeniture |
The Sun King is the ruler of Byuntun and primary title of House Kazimir. It is paired with the title Lord of the Sunfort. Before the Conquest of Byuntun, the title of House Kazimir was Sun Emperor.
Lords of the Sunfort
- Kalga Kazimir, the founder of House Kazimir
Sun Emperors
- Ubysh III Kazimir, the Sun Emperor during the Pelegonic Conquest
Sun Kings
- Marka II Kazimir, the final independent monarch of Byuntun, who swore fealty to Pelegon after the Conquest of Byuntun
- Vadimka III Kazimir
- Verinka I Kazimir, the current Sun Queen