Shiva Purana
भवः शर्वस्तथा रुद्रः पुनः पशुपतिस्तथा ॥ उग्रो महांस्तथा भीम ईशान इति तानि वै ॥ ५४ ॥
They are Bhava, Śarva, Rudra, Paśupati, Ugra, Mahat, Bhīma and Īśāna.
english translation
bhavaH zarvastathA rudraH punaH pazupatistathA ॥ ugro mahAMstathA bhIma IzAna iti tAni vai ॥ 54 ॥
hk transliteration by Sanscript