Fun etymology fact: the name Sverige is composed of two parts; Sve- and -rige. The first part refers to the Germanic tribe of the Swedes, who lived around lake Mälaren. This people is known as svear in Swedish (archaic sg. svee), from where the Sve- part comes. The country is named for them due to their significance in the consolidation of Sweden. (Which is a really complicated story that I won't get into here.)
The second part is originally the word rike, meaning "realm". Over time, the K sound became a voiced G instead, and the soft vowel E made the G a soft /j/ as well (Y as in yellow in English). Thus, we have the name Sverige being spelled the way it is but pronounced as if it were spelled sverje.
The English name Sweden was originally just a plural form meaning "Swedes", but came to refer to the country. In old English, Sweden was called Sweorice, bearing obvious resemblance to Sverige.
Then there was that time at the council of Basel in 1434 when Swedish and Spanish diplomats argued over who were the best Goths. Swedish diplomats argued that since the Geats and Goths are the same people (which is disputed), and the Geats are Swedes now, and the Goths brought down the Roman Empire, ergo the not at all biased conclusion that Sweden is mightier than the Roman Empire. The Spanish diplomats on the other hand argued that the Geats were the cowardly stay-at-home Goths while the Spanish were descended from the courageous warring Visigoths.
Diplomacy is serious.