Interestingly (well, to some...) a very early Welsh-language poem is likely to have been composed in the area near Caeredin - 'Y Gododdin' by Aneirin.
"Britain's oldest heroic poem" is a praise poem about an army raised in the Brythonic kingdom of Gododdin in modern south-east Scotland which travelled south to fight against the ?Angles at Catraeth (modern ?Catterick) in about 600 AD. The attack was a disaster, and the army of Gododdin was heavily defeated. The kingdom survived for some time until the Angles finally brought it to an end by capturing Edinburgh in c638 AD, after which the only surviving Brythonic kingdom in that northern part of Britain was that of Ystrad Glud (Strathclyde).
Your answer is correct in Scottish Gaelic but unfortunately not in Welsh.
Ha, I keep getting this wrong because I don't know how to spell edinborough