In Tattvārtha Sūtra 4.11, the topic is the subclasses of Vyantara देवs. The sūtra says:

“व्यन्तराः किन्नरकिम्पुरुषमहोरगगन्धर्वयक्षराक्षसभूतपिशाचाः ॥ 4.11 ॥”

Meaning: Vyantara devas are of eight types — Kinnara, Kimpuruṣa, Mahoraga, Gandharva, Yakṣa, Rākṣasa, Bhūta, and Piśāca. ( wisdomlib.org)

So, in simple words, this sūtra is explaining the eight categories of peripatetic/celestial beings called Vyantara devas. ( wisdomlib.org)