Hari Nama Keerthanam

Hari Nama Keerthanam is a medieval devotional and philosophical text in Malayalam. Its title translates into English as "The Song of the Holy Name Hari". It was composed by Thunchaththu Ramanujan Ezhuthachan in Kerala around the 16th century. The work is historically important as it solidified the acceptance of the 51 letter version of the Malayalam alphabet owing to the song's immense popularity.