Subrahmanya is unknowable even by Vishnu, Brahma, Indra, the four Vedas, the devas and others. He is the Lord without beginning, sign, and attribute.
Palani Āndavar Mayilvidu Thoothu

Subrahmanya is unknowable even by Vishnu, Brahma, Indra, the four Vedas, the devas and others. He is the Lord without beginning, sign, and attribute.