Zia is a name of at least five acts:
1) Zia Atabi, of 1960's Iranian rock.
2) An American electronic act.
3) An alternative rock en español band.
4) A romanisation of 지아, a pseudonym of Korean singer 박지혜.
5) A South African afro pop band.
1) A mononym Zia Atabi, of 1960's Iranian rock. His releases, under this name, include: "Helelyos" and "Kofriam".
Sites: Discogs
2) An exclusively electronic band who began performing on the East Coast, USA. Read more on Last.fm