Complex sentence: The matriarchial head of the family was Karthyayini Amma whose husband was Palakunnathu Krishna Pillai of Cherthala alias'Penang Padmanabha Pillai' or P K Pillai, who had had six sons of whom Satyapalan Nair (Baby) was a leading producer of many early Malayalam films.
Split into simpler sentences: The matriarchial head of the family was Karthiyayini Amma whose husband was PK Pillai (Palakunnathu Krishna Pillai of Cherthala) alias'Penang Padmanabha Pillai'. PK Pillai had six sons of whom Satyapalan Nair (Baby) was a leading producer of many early Malayalam films.