Sinhalese arka (4)
According to Clough’s Sinhala English Dictionary, Sinhalese word arka means “sun.” It traces its origin to the Tamil root ar through the transformation of ar > arc > arka. The following words, related to Sinhalese arka, also originate from Tamil ar.
arkanandana, Yama, son of Sùrya. arkabandhu and arkabándhawa, (sun, kinsman) name of Buddha expressive of his family origin, viz, Sùrya waṇsa or line of the sun.