Tribal

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Middle English: from Old French tribu or Latin tribus (singular and plural); perhaps related to tri- ‘three’ and referring to the three divisions of the early people of Rome.

wiktionary

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From Latin tribālis; surface analysis tribe +‎ -al, first attested in the 1630s. [1] [2] [3] [4]

etymonline

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tribal (adj.)

1630s, "pertaining to or characteristic of tribes," from tribe + -al (1). Meaning "characterized by a strong sense of loyalty to one's group" is from 1951 (Arendt). As a style of belly-dance from 1999, American English. Related: Tribally.