1) Indian caste 
Kartha (in Kerala, India)or Karthavu is a Hindu Nair title name. It was conferred by the king to powerful Nair families who enjoyed Raja or Naduvazhi status. The most important of the Kartha clans are Anakkottil Kartha ,Meenachil Kartha and Kalathil Kartha. Their independent principality was annexed by Marthandavarma along with Thekkumkur and Vada...