3

Ishanya refers to the Northeast direction in Vastu Shastra and "Ishana" is a name of Siva. Is there a connection?

5

Varaha Purana, Chapter 76, describes the Asta Dikpala (eight guardians of directions) and according to this, Ishana is the ruler of north-eastern direction.

1-2. On the resplendent eastern part of Meru full of different minerals and in the form of a circular extension, there is the city of the immortals full of mighty gods and demons, full of gold and with well-devised pathways and arches.
3-5. To its north-east with hundreds of spires and extensive lakes, decerated with flowers and flags, is the prosperous city of Indra named Amaravati abounding in Devas, Yaksas, Apsarases and sages.
6. In the interior of Amaravati there is a hall full of diamonds and other gems, which is well known as the assembly Sudharma.
7. In it remains the thousand-eyed Indra, husband of Saci, surrounded by Siddhas and other divine beings.
8. Indra, revered by all other gods, is the president of this assembly. The great sun is there.
9. On its side, as broad and splendid like it, is the city of Agni, called Tejovatī.
10. Next is the beautiful city of Vaivasvata (Yama), well known as Samyamini.
11. On the fourth direction is the city of Nirrti, called Krsnavati.
12. The fifth, on the northern side, is the city of the lord of waters (Varuņa), called Suddhavati.
13. Beyond that in the north is the city of Vayu, called Gandhayatī,
14. On its right is the beautiful city of Kubera, called Mahodaya with a hall of Vaidūrya gems.
15. On the eighth quarter is the city of Išāna, called Manoharā.
16. This world of gods, prayed for by people in their different aśramas (stages of life ) is svarga (heaven).

So, from above the conclusion is:

  1. east: Indra
  2. south-east: Agni
  3. south: Vaivasvata
  4. south-western: Nirṛti
  5. western: Varuṇa
  6. north-western: Vāyu
  7. northern: Kubera
  8. north-eastern: Ishana
3

The term 'Ishana' explained in details here shows how it is connected with Lord Shiva:

1) Īśāna:—One of the five aspects of Śiva, known collectively as the Pañchabrahmās. They are emanations from the niṣkala-Śiva. Īśāna, according to the Rūpamaṇḍana, should have the colour as pure as that of the crystal; his head should be adorned with a jaṭāmakuṭa ornamented with the crescent moon and his hnads should have the akṣamālā, triśūla, kapāla and abhaya.

The Śrītatvanidhi gives somewhat different description. Īśāna should have, according to this work, five faces; each of these faces should have three eyes; the colour of Īśāna, should be white. This face ought to point to the top. Īśāna should have in his hands abhaya, varada (?) (iṣṭa in the original), aṅkuśa, pāśa, ṭaṅkā, kapāla, ḍhakka (a musical instrument), akṣamāla and śūla.

2) The deity Īśāna representing the Karmasāda has a perfectly white body resembling the flower of the kunda (a kind of jasmine) or the full moon; having five heads adorned with jaṭā-makuṭas; bearing on each face three eyes, ten arms and two legs. He is standing on a padmāsana and keeps in his right hands the śūla, paraśu, khaḍga, vajra and abhaya and in the left ones the nāga, pāśa, aṅkuśa, ghaṇṭa, and agni. He is beatiful adorned with all ornaments, draped in fine clothes and is with a smiling countenance full of peacefulness.

3) Īśāna (ईशान):—One of the eight names of Rudra, given to him by Brahmā, according to the Pādma-purāṇa. This aspect became the presiding deity over the fire. The corresponding name of the consort is Vikeśī. His son is called Lohitāṅga (Mars).

4) Īśāna (ईशान):—Fifth of the eleven emanations of Rudra (ekādaśa-rudra), according to the Aṃśumadbhedāgama and the Śilparatna. The images of this aspects of Śiva should have three eyes, four arms, jaṭāmakuṭas and be of white colour. It should be draped also in white clothes and be standing erect (samabhaṅga) on a padmapīṭha. It should be adorned with all ornaments and with garlands composed of all flowers and it should keep their front right hand in the abhaya and the front left hand in the varada poses, while it should carry in the back right hand the paraśu and in the back left hand the mṛga.

5) Īśāna (ईशान):—Third of the twelve emanations of Rudra, according to the Rūpamaṇḍana.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .