What is "zie'l"

Zie'l are an African-American all-female Christian R&B and urban contemporary gospel group, who primarily plays contemporary R&B and soul music. They come from Shreveport, Louisiana, where the group started making music in 1998. The group have released two studio albums, Genesis and Zie'l (Pronounced Zy-El). Their second album was the groups breakthrough album on the Billboard magazine charts.