Warner is an English, Finnish, Norwegian and Swedish given name that is an alternate form of Werner that is in use throughout North America, Australia, New Zealand, Papua New Guinea, the Philippines, Peninsular Malaysia, India, Pakistan, the British Isles, Norway, Finland, Sweden, Republic of Karelia, Estonia, Guyana, Liberia, Sierra Leone, Ghana, Namibia, South Africa, Botswana, Zimbabwe, Zambia, Malawi, Tanzania, Uganda, Kenya, Sudan, South Sudan, Ethiopia, Cameroon and Nigeria. Wikipedia