English: from Middle English pe, pa, po
‘peacock’, with the later disambiguating addition of cok ‘male
bird’, hence a nickname for a vain, strutting person or for a dandy.
In some cases it may be a habitational name from a house distinguished
by the sign of a peacock. This surname is established in Ireland also.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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