Visravamuni- Children by others- Kuvera, Karan, Tirisara
Children by Kekasi ( daughter of Sumali-Yakka) – Ravana, Kumabhakarna, Surpanka, Vibheeshana
Ravana + Mandodaree
Children- Indrajith, Athkayan, Akshan, Tirisira, Narantakan, Devantakan
As per Arachaeo Astronomy research of Mr.Hari and his team (historical Rama) from India, Ravan was born on 10 January 5114 BC
Ravana was a great chanter of the Sama Veda, and a great devotee of Lord Shiva who had visited Mount Kailash, which he could have very well done from northern Yadu regions like Mathura. Ravana was well versed in Sanskrit and the composer of the famous Shiva Tandava Stotra. While one may argue that such a composition was of a later time than Ravana, it still shows a tradition that connects him with Sanskrit. His native tongue does not appear to have been Dravidian.
King Ravana is known to have been a very learned and pious man, a wise, just and peaceful rule, a loving husband, a fond father & brother. A famous flutist & composer well versed in Vedas, Angas and Sastras. He is called Dasis Ravana which means the king with 10 great talents. He was a descendant of Surya Wansha and Hela Raskshasa tribe. (Ancient Sinhalese tribe) He was one of the best fighters in Angampora, the traditional martial arts of ancient Sinhale.
King Dasis Ravana was a great Scholar in Ayurvedic medicine. He was the person who invented Arka Shastra. The book Arka Prakshaya reveals this truth to the present world. He wrote several books revealing the cures for many diseases. In one book he wrote "Eating beef cause to infect ninety eight new diseases to human beings. The book "Kumara Tantraya" which reveals the treatments for infant diseases was written by him accepting the request of his pregnant queen Mandodari.
In available records Ravana also comes out as a just ruler who governed the country very well. There was internal peace and no feud. He was the head of civil, judicial, military and spiritual administration of his vast and extensive realm. There was obedience not through fear but out of love for the safety of peace-giving monarch. Harmony prevailed.