Ammwyl pobl, yr wyf i yn gwneud ymchwil ar hanes Cymraeg yn gynnar, ac y mae u n neu dwy pwnc yn drysu. Wedi yr angau o Urien ac o Owain Rheged, pa beth dig wyddod am (?) Caer Ligualid? A oedd hi cymrydir ar unwaith gan Brynaich, neu oedd hi yn sefyll heb amddiffyniad yd ddoddodd Reged rhan Frynaich/Northumbria? A oedd yn adnabod "York" fel "Efrog" gan y Brython? Oes mwy cwestiwnau genny f i, ond mae yma yn ddigon. Diolch. I am doing research on early Welsh history, and there are one or two confusing points. After the deaths of Urien and Owain of Rheged, what happened to Carlis le? Was it occupied immediately by Brynaich? Or did it sit defenseless until Reged became part of Northumbria? Was the City of York called Efrog by the Br itons? I have more questions, but that will (have to) do for now. Thanks. Cor rections welcome. Brian Griffin