Here's why:
* Changampuzha's Poetry: His poetry is characterized by its profound emotional depth, lyrical beauty, and mythical themes, similar to the Greek poet Orpheus. This comparison likely originated from literary critics and scholars who saw these parallels in his works.
* No Single Source: The term "Orpheus of Malayalam" is not attributed to any specific person or publication. It is a common phrase used to describe Changampuzha's poetic prowess, and his influence on Malayalam literature.
Therefore, while there isn't a specific person who coined this title, it is a widely accepted and respected recognition of Changampuzha's immense contribution to Malayalam literature.