Etymology
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Melbourne 

city in Australia, named 1837 for William Lamb (1779-1848), 2nd Viscount Melbourne, then British Prime Minister; the title is from Melbourne Hall, Derbyshire. The place name is literally "mill stream," Old English Mileburne (1086).

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Sydney 
Australian city, founded 1788 and named for British Home Secretary Thomas Townshend, 1st Viscount Sydney (1733-1800). The family name (also Sidney) is literally "dweller by the well-watered land," from Old English sid "side" + ieg "island."
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