Oneira is the name of at least 3 bands:

1. Oneira was a post-hardcore/metalcore band from Sacramento/Folsom, California, United States.

They released their self-titled EP in 2010 which had a feature with Josh Doty from Ten After Two.

reverbnation.com/oneira
myspace.com/oneira916

2. Oneira was a melodic metal band from Wiltshire, England, who formed in 2004 with just 3 members, before a second guitarist and vocalist were recruited later. Taking influences from heavy metal bands such as 3 inches of blood and iron maiden, as well as modern metalcore acts like As I Lay Dying and Still Remains, they have currently shared the stage with other great unsigned bands from the area including Hate Induced Coma, Decora, Witness to an End and many more.

3. Oneira was a collaboration of musicians of French, Iranian and Greek background, giving the group a uniquely classical and traditional Mediterranean/Middle-Eastern sound.

This project is the outcome of the collaboration of French, Iranian and Greek musicians, inspired by these countries’ musical traditions. Oneïra gathers together six musicians with a long experience in various types of music, such as jazz, classical, and traditional music. They create a musical bridge between their cultures, in an attempt to explore the common features of the Mediterranean music.

From Marseille, Paris, Athens and Thessaloniki, formed with Bijan Chemirani on percussion, Kevin Seddiki on the guitar, Maryam Chemirani and Maria Simoglou singing, Harris Lambrakis on the ney, and Pierlau Bertolino on the electroacoustic hurdy-gurdy, this group creates a musical bridge with a hint of sensual melancholy, fusing the different cultures of its musicians. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.