Answer:
"Kosova" is the Albanian name and "Kosovo" is the Serbian name, so unsurprisingly the Albanian-speaking government that announced independence in February 2008 calls itself the Republic of Kosova. The government of Serbia, which hasn't recognized that government, calls it Kosovo. So whether you use "Kosovo" or "Kosova" can depend on your opinion of the situation in the place concerned. But most English speakers use "Kosovo" without implying that they believe that Kosovo is Serbian. Still, the government that the UK, the USA, Australia, and Canada -- important English-speaking states -- recognize calls itself Kosova, so maybe we should start too.
The names "Kosovo" and "Kosova" come from the Serbian word "kos", which means blackbird.
its Republic of Kosova since February 17 ,2008 .and not kosovo
REMEMBER : REPUBLIC OF KOSOVA