There are at least three bands with the name Marrow

1) A hardcore band from Tacoma/Seattle with ex members of Greyskull, Degania, and Taiga. So far they've released a tour demo and are featured in Comadre's Mixtape III

http://marrow.bandcamp.com/
http://www.myspace.com/theseaofmarrow
http://marrowmarrow.blogspot.com/

2) A gore metal band from Baltimore, MD. consisting of Ren-bludgeoned and bruised trachia.
Paul-guitar stringed auto-erotic asphyxiation.
Mike-reminiscent beating of a dying vascular organ.
Jeff-subtonal ear drum obliteration
Released "Of Slaughter And Slime" 7in under Dysphoria Distro and Horror Pain Gore Death Production http://www.myspace.com/goremarrow
AWESOME STUFF......Doing split with Machetazo soon....very exciting!!!!

3) An electronic dance trio from San Francisco, CA. Called a “Top 40 Atari Teenage Riot” (SF Chronicle), to say that Marrow is not your typical electronic band is an understatement. And understatement is not what band members Jeremy Fortes, David Earl and Erin Fortes do.

Their second album, 'Sunshine Enema' drops March 2, 2010.

http://blissisignorance.com
http://myspace.com/blissisignorance
http://shorefire.com/clients/marrow/

4) Hip-Hop/Rap artist from Toronto, Canada. Also known as Routiger Slob Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.