Facts about them:
•They're all related to each other by blood and are siblings. England is just their adopted father.
•Sealand is the oldest while Knock John is the youngest
•The Maunsell Army Forts are their half-siblings.
•Sunk Heads and Tongue Sands are both dead (one by being blown up and one by drowning/dismemberment)
•All have equal military training and have fought and lived through a majority of WW2
•Majority of their childhood was spent in war
Several countries have in the past banned ruling queens, but lacked any requirement that the king be male. This led to King Anna of Poland, and King Mary of Hungary.