Complex sentence: Muthuraman's son Karthik Muthuraman is also a Tamil actor and politician and his grandson Gautham Karthik who also made his debut in "Kadal" (2013).
Split into simpler sentences: Muthuraman's son Karthik Muthuraman is also a Tamil actor and politician. His grandson Gautham Karthik is an actor who made his debut in "Kadal" (2013).