Anglicized form of the Gaelic name Dubhghlas, which meant "dark river" or "blood river" from Gaelic dubh "dark" and glais "water, river". Douglas was originally a river name, the site of a particularly bloody battle, which then became a Scottish surname. The surname belonged to a powerful line of Scottish earls.
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dance you fucker dance you fucker dont you dare dont you dare dont you flan in the face