Gnomes are a diminutive race, possibly more diverse in their subtypes than any other race. Rock gnomes (sometimes called tinker gnomes) excel at invention and often feel the tug between the reclusive heritage and inquisitive natures. Meanwhile their elusive cousins the Forest gnomes masters of illusion magic and communing with animals live at one with nature in their woodland retreats. Finally deep gnomes, or Svirfneblin as they call themselves, are master miners with a flair for magic and adaptations befitting their subterranean abodes.
Subtypes available: Rock gnomes and Forest gnomes as per PHB, Deep gnomes as per Here