What is the meaning of the name Thor?

The name Thor comes from old Norse meaning "Thunderer". Thor was the son of Odin. He was the Norse god of strength, thunder and war. He wielded a mighty hammer named Miolnir, which he employed sparingly. It was said that when Thor became angry or frustrated he would strike the ground with Miolnir. This would produce the sound we know as thunder. In his honour, Thor was granted his own day of reverence by those who worshipped him... Thor's day. Over the years, Thor's day became what we know today as Thursday.
It is the Old Norse Word for thunder.