The name Beowulf, coming from a period literary source, is certainly documentable. The question is whether the CoA would allow you to use it - that whole 'historic personage' rule. I don't know whether it was ever used with a byname in period - if so, it would certainly be acceptable.
Cedric - definitely post-period - Walter Scott couldn't spell - proper period would be Cerdic - and while documentable, you might run into the same case as above.
I don't know on the others - Corwyn is doubtful but could be a later form of something documentable in period.
thje layperson guesses....
Date: 2010-03-01 01:22 am (UTC)Culann - unsure
Corwyn or Corwin - period
Cedric - want to say period but somehow doubt it is.
Mongo - not period
no subject
Date: 2010-03-01 03:28 am (UTC)Beowulf, yes, but possibly not used outside the tale
Culann, yes
Corwyn ... no
Cedric .... No.
But other than Beowulf, I'm guessing
no subject
Date: 2010-03-01 03:10 pm (UTC)Cedric - definitely post-period - Walter Scott couldn't spell - proper period would be Cerdic - and while documentable, you might run into the same case as above.
I don't know on the others - Corwyn is doubtful but could be a later form of something documentable in period.
no subject
Date: 2010-03-03 12:36 am (UTC)no subject
Date: 2010-03-03 12:52 am (UTC)