Ikkeri and subsequent settlement between Kolathiri and the invader in AD 1736-37 led to considerable change within the family of Kolathiris. The Udayamangalam branch was shut out from assuming the title Rājā and the title of Kolathiri fell into disuse. The ruling family (Palli division) monopolized the right of succession as Rāja, leading to the supersession of the ancient title of Kolathiri Rājā to the Chirakkal Raja. Ascension to Kshatriyahood In 1617 A.D Kolathiri Rāja, Udayavarman, wished to further promote himself to full recognition by performing Hiranya-garbhā, which the Nambũdiris refused. As he attempted to force the Nambũdiri Brahmins of Taliparamba (Perumchellũr) to perform this ritual for him, the Nambũdiri Brahmins refused him by stating: ‘Kolathiri had no right to ask them to perform a sacrifice since in the jurisdiction of Perumtrikkovilappan (the deity of the Rajarajeswara temple of Perumchellũr, Taliparamba) the order of any king would not be valid’ (The epithet of the deity rajarajeswara or king of the kings blatantly indicates the royal status assumed by the deity). As Historian Samuel Mateer; "There seems reason to believe that the whole of the kings of Malabar also, notwithstanding the pretensions set up for them of late by their dependents, belong to the same great body, and are homogeneous with the mass of the people called Nairs, So Namboodiris were reluctant to give Kshtriyahood to all the Nair lords, Consequently, Udayavarman brought 237 Brahmin families (Sāgara Dwijas) from Gokarnam and settled them in five Desams. (Cheruthāzham, Kunniriyam, Arathil, Kulappuram and Vararuchimangalam of Perinchelloor Grāmam). The latter adopted Nambũdiri customs and performed Hiranya-garbhā and conferred Kshatriyahood on the former. Later, on the request of Rājā of Travancore, 185 of these Sāgara dwijans families were sent to Thiruvalla. (Thiruvalladesi Embraanthiris). Calendar system The version of Kolla-Varsham or Kolla-varsham practiced in central/south Kerala excepting North Malabar (Kolathunadu) began on 25 August 825 A. D and the year commences with Simha-raasi (Leo) and not in Mesha-raasi (Aries) as in other Indian calendars. Although there are several accounts, current, recorded and hearsay about the commencement of the Kollam era, however in erstwhile North Malabar / Kolathunadu, the Kollam era is reckoned from the next month, Kanya-rasi (Virgo) (25 September) instead. This variation has two interesting accounts associated with it. (1) The traditional text Kerololpathi attributes the introduction of Kollam era to Shankaracharya. So if you convert the word "Aa chaa rya vaa ga bhed ya"