We have listed Mahabharata tribes on Jatland Wiki at -
[Wiki]List of the Mahabharata tribes[/Wiki]
There is
Bhuta (भूत) tribe mentioned in
[Wiki]Ashvamedhika Parva[/Wiki] 
XIV.8.5), (XIV.8),
भूतानि च पिशाचाश चनासत्याव अश्विनाव अपि | गन्धर्वाप्सरसश चैव यक्षा थेवर्षयस तदा ||
See - [Wiki]Aswamedha Parva, Mahabharata/Book 14 Chapter 8[/Wiki]
I quote from this chapter:
"*There is a peak named
Munjaban (Punjavan) on the summits of the
Himalaya mountains, where the adorable
Lord of Uma (Mahadeva) is constantly engaged in austere devotional exercises.
*There the mighty and worshipful god of great puissance, accompanied by his consort Uma, and armed with his trident, surrounded by wild goblins of many sorts, pursuing his random wish or fancy, constantly resides in the shade of giant forest trees, or in the caves, or on the rugged peaks of the great mountain.
*And there the Rudras, the Saddhyas, Viswedevas, the Vasus,
Yama, Varuna, and Kuvera with all his attendants, and the spirits and goblins, and the two Aswins, the Gandharvas, the Apsaras, the Yakshas, as also the celestial sages, the Sun-gods, as well as the gods presiding over the winds, and evil spirits of all sorts, worship the high-souled Umapati, possessed of diverse characteristics.
*And, O foremost of conquerors, on all sides of that mountain, there exist mines of gold, resplendent as the rays of the sun.
*And O king, the attendants of Kuvera, desirous of doing good to him,
protect these mines of gold from intruders, with uplifted arms.
*Hie thee thither, and appease that adorable god who is known by the following names:
Names of Shiva
Sharva, Vedha, Rudra, Shitikantha, Surapa, Suvarcha, Kapardi, Karala, Haryaksha, Varada, Tryaksha, Pushna, Dantabhida, Vamana, Shiva, Yamya, Avyaktarupa, Sadvritta, Shankara, Kshemya, Harikesa, Sthanu, Purusha, Harinetra, Munda, Krisha, Uttarana, Bhaskara, Sutirtha, Devadeva, Ranha, Ushnishi, Suvaktra, Sahasraksha, Midhu, Girisa, Prashanta, Yata, Chiravasa, Vilwadanda, Siddha, Sarvadandadhara, Mriga, Vyadha, Mahan, Dhanesa, Bhava, Vara, Somavaktra, Siddhamantra, Chakshu, Hiranyavahu, Ugra, Dikpati, Lelihana, Goshtha, Shiddhamantra, Vrishnu, Pasupati, Bhutapati, Vrisha, Matribhakta, Senani, Madhyama, Sruvahasta, Yati, Dhanwi, Bhargava, Aja, Krishnanetra, Virupaksha, Tikshnadanshtra, Tikshna, Vaiswanaramukha, Mahadyuti, Ananga, Sarva, Dikpati, Bilohita, Dipta, Diptaksha, Mahauja, Vasuretas, Suvapu, Prithu, Kritivasa, Kapalmali, Suvarnamukuta, Mahadeva, Krishna, Tryamvaka, Anagha, Krodhana, Nrisansa, Mridu, Vahusali, Dandi, Taptatapa, Akrurakarma, Sahasrasira, Sahasra-charana, Swadha-swarupa, Vahurupa, Danshtri, Pinaki, Mahadeva, Mahayogi, Avyaya, Trisulahasta, Varada, Tryamvaka, Bhuvaneswara, Tripuraghna, Trinayana, Trilokesa, Mahanja, Sarvabhuta-prabhava, Sarvabhuta-dharana, Dharanidhara, Isana, Sankara, Sarva, Siva, Visveswara, Bhava, Umapati, Pasupati, Viswarupa, Maheswara, Virupaksha, Dasabhuja, Vrishavadhwaja, Ugra, Sthanu, Siva, Rudra, Sarva, Girisa, Iswara, Sitakantha, Aja, Sukra, Prithu, Prithuhara, Vara, Viswarupa, Virupaksha, Bahurupa, Umapati, Anangangahara, Hara, Sharanya, Mahadeva, Chaturmukha.
*There bowing unto that deity, must thou crave his protection. And thus, O prince, making thy submission to that high-souled
Mahadeva of great energy, shalt thou acquire that
gold.
*And the men who go there thus, succeed in obtaining the gold. Thus instructed,
Marutta, the son of
Karandhama, did as he was advised. And made superhuman arrangements for the performance of his sacrifice. And artisans manufactured
vessels of gold for that sacrifice.
*And
Vrihaspati too, hearing of the prosperity of
Marutta, eclipsing that of the gods, became greatly grieved at heart, and distressed at the thought that his rival
Samvarta should become prosperous, became sick at heart, and the glow of his complexion left him, and his frame became emaciated.
*And when the lord of the gods came to know that
Vrihaspati was much aggrieved, he went to him attended by the Immortals and addressed him thus."
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I have highlighted the key words which may help to research this place and people.