There is more than one artist with this name:
1) Nash is an English acid jazz group founded by Russell Nash, previously songwriter for Shola Ama and All Saints. They released "The Chancer" in 2001.
2) The correct tag for the Spanish boy band is D'Nash.
3) Hard Rock/Heavy Metal band from Colombia, formed in the '80s
4) Nash are a rock group that had their cover of "Naked City" included on the album "Undressed: An Unmasked Tribute to Kiss".
5) Nash is the name used by Texan country singer-songwriter Bill Nash