The name Umbra constitutes multiple musical projects as the name has become quite common.
1 - Umbra is a german metal band from the Ruhr-Area (Website: http://www.umbra-metal.de).
2 - Ümbra is an experimental electronic future beats trio from Brisbane, Australia
Their sounds can be heard at https://soundcloud.com/umbraband
3 - Umbra is a four-piece romanian rock band from Piatra Neamț. The name of the project is translated to The Shadow. The members of the group are: Read more on Last.fm