Regent Throsten ruled the kingdom until the year 542 when King Belvor IV became king at the age of 18.
1- 1980 World of Greyhawk folio, p10
2- Fate of Istus p83.
3- Living Greyhawk Gazetteer p41.
4- Living Greyhawk Gazetteer p130.
5- Hugh the III grants Bissel autonomy – Living Greyhawk Gazetteer p33 and 1980 World of Greyhawk folio p9.
6- Avras III is mentioned as noticing the rise of the demigod in 479. – Greyhawk Wars p3.
7- Avras III is noted as fighting Iuz until at least 505. –Greyhawk Wars boxed set.
8- Marklands page 3 it states that in 503 CY the current King Belvor II was all too happy to forget about Iuz.
9- King Thrommel II allows Dyvers to become independent in the year 526 – p9 of World of Greyhawk 1980 Folio. To make this work with the other canon sources, this should be King Thrommel IV.
10- Belvor III is King Avras III son (Greyhawk Wars p3). King Belvor III dies in his sleep in 537 (Marklands p4), after a reign of 15 years (Greyhawk wars p25).
11- Belvor IV is 61 years old in 585 CY. Marklands p38.
12- Lord Throsten regent for Belvor IV – Greyhawk Wars p3.
13- Living Greyhawk Gazetteer p47.