illathu nairs & thecchikkotte nairs..

these days vilakkithala nairs are equal to the normal nairs..& are even prominent then them..coz the arrogance & crookedness of the dominant nairs r absent in villakkithalavan nairs & additionally they have got both the genes of the warriors as wellas the artisans..so in terms of skills also they dominate the nairs & are the real warrior nairs.

No

All Ezhuthachan are not nairs but Nairs can be ezhuthachan,

Because Ezhuthachan is a title for teachers , its not where related to caste

bhargava gotra

yes,they are Shudras. Reference: Travancore state Manual