Neanderthal is the name for at least a couple of bands. 1) One was the seminal and short lived 90's powerviolence/hardcore band that in a later incarnation would be known as Man Is the Bastard. Check their OFFICIAL Myspace page: www.myspace.com/officialneanderthal for more info and music!!!!
2) Another Neanderthal happens to be My Ruin guitarist Mick Murphy's instrumental-metal side-project. Neanderthal's debut 'Start A Fire With Rock' was released on Undergroove in September '06.