Hamerian Dynasty

The House of Hamerian is an ancient dynastic line claiming descent to the Ancient Corinthian Republic. Following the War of the Devastation, House Hamerian ruled over The Fortress, which eventually became the Knight's Templar. House Hamerian was forced out of power in the War of 404, and was replaced with House Marconias. Following the Arcadian War of Succession, House Hamerian and House Marconias formed a triarchy with House Tyraile, with the Hamerians taking charge of the Naval forces of the Empire.
In 984, the Capital was devestated by an attack by Barbarian warriors, and the head of House Hamerian was the only surviving member of the Triarchy, acting as Elector Regent until the children of his former co-rulers came of age. Vectavius LVI had two children, Gaius and Joshua, with Princess Evelyn of Sleipnir, who later had their marriage annulled. When the Triarchs in Minority reached age, Vectavius tried to keep power for himself, resulting in a brief civil war, before order was restored. Gaius and Joshua acted against their father, and fled the country soon after.
At some point in ancient history, House Hamerian has married into the House of Sidon four or five times. Joshua discovered this and he and his brother raised an army to lay claim to Sidonia, which has been a burning, anarchic mess for nearly 350 years. In less than two years Sidonia capitulated and Joshua I was crowned King of Sidonia with Gaius as Hand. 
In 1014, Vectavius died in a duel with the Triarch of the Sword, and the Continuing Committee declared Rodric Taegren the new Triarch, not Gaius, the elder son. Gaius raised an army, left Sidonia, and began the Invasion of Lirrach. His mother, now the Empress of Gretia, was slow to join him, but eventually war broke out seperately between Gretia and the Templar, ending with the total defeat and absorption of the Templar. 
Joshua I had a son, Alder, and dissapeared in 1029. Gaius refused the crown and remained in Gretia, a year later Gaius was declared Emperor after coup deposed Emperor Maximus II, and formed the Gretian Parliament. In 1033, he was assasinated by the Prime Minister, however he was able to kill the PM before he died. After the ensuing civil war, which resulted in Lirrachan Independence, Alder I of Sidonia married Empress Elizabeth of Gretia, making all the Gretian rulers technically Hamerians, however they kept the Empress's name.
A 'pure' bloodline of Hamerians was formed from the children of Empress Elizabeths daughter, Helen, who married a Sidonian General, their descendents form the Modern House Hamerian, lead by Joshua II.