Etymology
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viscount (n.)
late 14c., "deputy of a count or earl," from Anglo-French and Old French visconte (Modern French vicomte), from Medieval Latin vicecomes (genitive vicecomitis), from Late Latin vice- "deputy" (see vice-) + Latin comes "member of an imperial court, nobleman" (see count (n.1)). As a rank in British peerage, first recorded 1440. Related: Viscountess.
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*ei- 
Proto-Indo-European root meaning "to go."

It forms all or part of: Abitur; adit; ambience; ambient; ambit; ambition; ambitious; andante; anion; cation; circuit; coitus; commence; commencement; concomitant; constable; count (n.1) title of nobility; county; dysprosium; errant; exit; initial; initiate; initiation; introit; ion; issue; itinerant; itinerary; janitor; January; Janus; Jena; Mahayana; obiter; obituary; perish; praetor; Praetorian; preterite; sedition; sudden; trance; transient; transit; transitive; viscount.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit e'ti "goes," imas "we go," ayanam "a going, way;" Avestan ae'iti "goes," Old Persian aitiy "goes;" Greek ienai "to go;" Latin ire "to go," iter "a way;" Old Irish ethaim "I go," Irish bothar "a road" (from *bou-itro- "cows' way"), Gaulish eimu "we go;" Lithuanian eiti "to go;" Old Church Slavonic iti "go;" Bulgarian ida "I go;" Russian idti "to go;" Gothic iddja "went."
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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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