Who was King of Denmark during world war two? A regnal number is not needed.
Regnal number event of one kingdom reaching independence from another but still under the same monarch, the monarch often retains the same number as he has already had in the older realm. King Christian X of Denmark thus became King Christian X of Iceland when Iceland became an independent kingdom in personal union with Denmark in 1918. The same is true for Commonwealth realms, where the monarch retains the regnal number from the British line of monarchs (see below). Beginning in 1603, when England and Scotland began to share a monarch but were still legally separate realms, their monarchs were numbered separately.
Regnal number name of the country (e.g. Alexandra of Denmark). It is not usual to number male consorts of a Queen regnant, or even to consider them as 'kings', unless both of them are crowned: as it was the case of Mary II and William III of England, or of all male kings consort in medieval crusader Kingdom of Jerusalem and in medieval Spanish Kingdom of Navarre. In the history of Spain the only king consort was Francisco de Asis de Borbón, husband of Isabella II, but he is not numbered at all and is never included in official regnal lists. The