Bloke

google

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mid 19th century: from Shelta.

wiktionary

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Origin unknown; the following borrowings have been hypothesized:

etymonline

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bloke (n.)

"fellow," 1851, also bloak, London slang, of unknown origin, perhaps from Celtic ploc "large, stubborn person;" another suggestion is Romany (Gypsy) and Hindi loke "a man."