Jnana Khanda

Each Veda consists of three parts

Karma Khanda deals with rites. Karma – the outward worship through action.
Upasana Khanda is about worship and meditation. Upasana – inner worship.
Jnana Khanda discusses supreme knowledge of the self. Jnana – wisdom.

Jata

A demon who kidnapped the Pandavas Yudhishthira, Nakula, Sahadeva and Draupadi while in exile. Bhima killed him.

Jvara/Jvarasura

The fever/the demon fever. He is together with Shitala, the Goddess of smallpox.

Read about Jvarasura here
http://mayathedal.blogspot.com/2018/02/jvarasura.html

Jada Bharata

The dull Bharata – the reborn King Bharata.

Read about Jada Bharata here
https://prabhupadabooks.com/sb/5/9?d=1
About Rahugana here
https://prabhupadabooks.com/sb/5/10?d=1

Jujube Tree

An immortal tree from the Ramayana.

Read about the Jujube Tree here
http://utkarshspeak.blogspot.com/2010/12/jujube-tree.html

Jibhutvahana

A name of Shiva ‚the one whose vehicle (vahana) is the cloud‘.

Sati asked Shiva for permanent residence. Shiva, the ascetic, had no desire for it. When Sati feared the rainy season, he was ready to compromise. They would be above the clouds during this time.

Jaya and Vijaya (Parvati)

The gatekeepers of Parvati’s chambers were Nandi and Bhringi, attendants of Shiva. They never had forbidden him to enter. Shiva often came at inappropriate time.

Parvati’s maids, Jaya and Vijaya, said the gatekeepers have to be subordinate to Parvati, not to Shiva.

Parvati created Ganesha.

The creation of Ganesha is told in numerous variations. This is from the Shiva Purana.

Janeu

The three upper castes receive the holy thread, Janeu (Hindi)/Yajnopavita (Sanskrit) that is considered a second birth, they are then called twice born, dvija. The rite is called Upanayana.

After that a third birth can take place, the initiation (diksha) with a guru, then the person is a trija.

Janardana

A name of Vishnu/Krishna.

Jimuta

A demon, mighty as Vritra at the curt of King Virata. Bhima killed him.