of course not. But the sun is somewhat special in the fact that it is a lone star, most stars exist as part of binary or tertiary systems and other multi star clusters.
Short answer: It's adapted from earlier terms in old english.The English proper noun sun developed from Old English sunne, and may be related to south. Cognates to English sun appear in other...
The word "outhouse" was already taken, and "eyehurter" was just too many syllables. The Old English word was sunne, similar to the German sonne. The English simply used a shorter version of the word...