CC Madhya 21.58
cira-loka-pāla-śabde tāhāra gaṇana
“Actually it is very difficult to ascertain the number of universes. Every universe has its separate Lord Brahmā and Lord Śiva, who are known as permanent governors. Therefore there is also no counting them.
Lord Brahmā and Lord Śiva are called cira-loka-pāla, permanent governors. This means that they govern the affairs of the universe from the beginning of the creation to the end. In the next creation, the same living entities may not be present, but because Brahmā and Śiva are existing from the beginning to the end, they are called cira-loka-pāla, permanent governors. Loka-pāla means “predominating deities.” There are eight predominating deities of the prominent heavenly planets, and they are Indra, Agni, Yama, Varuṇa, Nirṛti, Vāyu, Kuvera and Śiva.