Stephen, the usurper took over at age 48.
His early life is unknown, but is widley thought he ws born in Ireland.
After usurping and murdering the true king, Edward I, he took over in 705 AD. He was already married and had a son at age 45. He ruled for 5 years, before...
Stephen was murdered in his sleep and his queen was expelled, his 8 year old son would take over in 710 AD.