There are various schools of thought regarding the original home of the Aryans. The most important theory which held the field for a long time was that the Aryans originally lived in Central Asia. This theory was propounded by Prof Max Muller a German scholar of comparative languages. He stated that the ancestors of the Indians, Greeks, Persians, Romans, Germans and the Celts must have lived together originally. The 'Pitri' and 'Matri' in Sanskrit are essentially the same as the Persian 'Pidar' and 'Madar', the Latin 'Pater' and 'Mater' and the English 'Father' and 'Mother'.