Haitian Vodou (/ˈvoʊ.duː/, French: [vodu], also written as Vaudou; /ˈvoʊ.duː/ Vodun or Vodoun /ˈvoʊ.duːn/; and commonly Voodoo /ˈvuː.duː/) is a syncretic religion practiced chiefly in Haiti and the Haitian diaspora. Practitioners are called "vodouists" (French: vodouisants [voduisɑ̃]) or "servants of the spirits" (Haitian Creole: sèvitè). In Haiti, whereas a very small number of Roman Catholics combine their faith with aspects of Vodou, this practice is denounced as diabolical by virtually all Haitian Protestants.