H. P. Blavatsky

Svayambhû. A metaphysical and philosophical term, meaning “the spontaneously self‐produced” or the “self‐existent being ”. An epithet of Brahmâ. Svâyambhuva is also the name of the first Manu.

Source: H. P. Blavatsky, The Theosophical Glossary, art. Svayambhu