The Mahabharata regards Vishrava as the brother of Kubera so Kubera is described as the uncle of Ravana and his siblings.

Ravana daughter name. He got a boon from Lord brahma to be a Guardian of Heavenly Wealth. Ravana the chief antagonist of the Ramayana Kumbhakarna Vibhishana and Soorpanaka. His father was Vishravas so brahmin sage Pulastya who is believed to hail from village Bisrakh in Haryana.

Goddess Sitas birth is disputed and vague as she was said to be found in a furrow in a plowed field and for that reason is regarded as a daughter of Bhumi Devi. There is a mention of Vedavati who is the daughter of Brahmarishi Kusadhvaja who is the son of Brihaspati Lord-Guru of the Devas the GodsHaving spent his life chanting and studying the sacred Vedas he names his daughter Vedavati or Embodiment of the Vedas born as the fruit of his bhakti and tapasya. Kaikesi also known as Nikasha and Keshini was the mother of Ravana.

She seduced Sage Vishrava and married him. He was the ruler of lanka before he was overthrown by Ravana. Kaikesi was the daughter of Rakshasa Sumali and his wife Ketumati who was a Gandharva princess.

After attaining boons from Brahma Ravana went to Sumali and Malyavana. Lord Kubera Vaishravana or Kuber was an older half brother of Ravana. According to Uttara Purana Sita was Ravanas daughter.

Manivati disgusted with Ravanas behaviour decided to take revenge. His wifes name was Sarama and had a daughter named Trijata. Later two other daughters of Sumali married Vishravas and more Rakshasa children were born.

Kaikesi had two brothers Maricha and Subahu which would effectively make them Lord Ravanas uncles. Rama accepted Vibhishans service and anointed him the Lord of Lanka after Ravans death. Kaikesi had two brothers Maricha and Subahu which would effectively make them Ravanas uncles.