Follow the link.
Just in case he can't find his reading glasses, Izzy.......
From the link in question: -
"In addition to having a role in the 'election' of English Kings,
it is often held [BY WHOM????] that the witenagemots had the power to depose an unpopular king.
However, there are only two occasions where this probably happened,
in 757 and 774 with the depositions of kings Sigeberht of Wessex and Alhred of Northumbria respectively."
Your link is cast in SPECULATIVE guesswork.
I can speculate on how much gold
there in on Saturn.
You have to understand that our history goes waaaay back before the creation of Hollywood, Omsig.
I'm afraid we didn't have google or Reuters back then, and had to make do with any and every hint of written account available, however tenuous.
Those two Kings WERE deposed.
The Wittan WAS in existence at the time.
What do you want? A trip in the Tardis?
When all this stuff was going on, your 25th Great Grandpappy was PROBABLY just a spunkbubble.
This doesn't mean that you should doubt his existence though.