Jaya Guru Datta
I have culled this information on other significant twelves (Dvadasas)
12 skandas in Bhagavatam
Brahmanda Purana (12,000 verses)
According to the Aitareya-Brahmana, Brahma as Prajapati (lord of beings) manifests himself first of all as twelve bodies or attributes, which are represented by the twelve gods, symbolizing 1) fire; 2) the sun; 3) soma, which gives omniscience; 4) all living beings; 5) vayu, or ether; 6) death, or breath of destruction -- Siva; 7) earth; 8) heaven; 9) Agni, the immaterial fire; 10) Aditya, the immaterial and invisible sun; 11) mind; and 12) the great infinite cycle, "which is not to be stopped." Brahma in one of his phases therefore is the visible universe, every atom of which is essentially himself.
Lord Rama's exile 12 +1
Aditi’s sons were the twelve gods known as the adityas. Their names were Vishnu, Shakra, Aryama, Dhata, Vidhata, Tvashta, Pusha, Vivasvana, Savita, Mitravaruna, Amsha and Bhaga.
Brahma once recounted to the sages the one hundred and eight sacred names of Surya.
The Brahma Purana lists these names and we reproduce them nine groups of twelve names each.
The twelve adityas are nothing but different forms of Surya.
Their names are Indra, Dhata, Parjanya, Tvashta, Pusha, Aryama, Bhaga, Vivasvana, Vishnu, Amashumana, Varuna and Mitra,
In each month of the year, it is a different aditya who shines, Indra shines in the month of Ashvina, Dhata in Kartika , Parjanya in Shravana, Tvashta in Falguna, Pusha in Pousha, Aryama in Vaishakha, Bhaga in Magha, Vivasvana in Jyaishtha, Vishnu in Chaitra, Amshumana in Ashada, Varuna in Bhadra and Mitra in Agrahayana.
Vishnu has twelve hundred rays
Dvadasha (12) Jyotirlingas
Dvadasha (12) Shakti Peethas