Saint Sundarar and his friend Saint Cheraman Perumal are dated to have lived in the later part of 7th century and early part of 8th century CE. Saint Sundarar wrote 'Thiruthondar Thokai' in which he describes the lives, achievements and miracles of Saiva saints who lived before him, which includes Saint Thirugnana Sambandar and Saint Thirunavukkkarasar. If he sang about these two saints who lived at the time of the Prophet, he must have lived later than them which means his friend Cheraman Perumal must have lived later than Muhammad. The veracity of this story has to be verified. But Sadasivan, in his book "A Social History of India", argue that it was the king of Maldives, Kalimanja, who converted to Islam. Mali, which was known to seafarers then, might have been misunderstood as Malabar (Kerala) and this might have given rise to the tale of Tajuddeen in the Cochin Gazetteer. In 14 march 2014, a Malayalam film was announced to be made depicting the life of Cheraman Perumal or Tajuddeen starring Mammotty as Cheraman. India and Oman will co-produce the film.