Please explain why we have three bands doing the rounds with such similar names...? Is it Vampire Weekend's fault?

http://soundcloud.com/theweekndxo

http://www.last.fm/music/Weekend // http://open.spotify.com/album/2wutAIg1gs7aY7AkyT5HXf

http://en.wikipedia.org/wiki/The_Weekend_(Canadian_band)