Complex sentence: Remnants of the name Adithya from the medieval period can still be found in Karava family names and in addition the Karava clan Varunakulasuriya too signifies Varuna-Adithya as Adithya is a synonym for Suriya (ie. the Sun).
Split into simpler sentences: Remnants of the name Adithya from the medieval period can still be found in Karava family names. As Adithya is a synonym for Suriya (ie. the Sun).