Vaisya n. : The third of the four great original castes among the Hindus, now either extinct or partially represented by the mercantile class of Banyas. See the Note under Caste, 1.

Example:
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Taxonomy
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Defination from the web:
Vaisyas eventually became land-owners, money-lenders and influential traders and are often credited for the evolution of ... The Vaisya community consist of several Jātis, notably — the Agarwals, the Vijayvargiyas, the Khandelwals, the Mathuria Vaishya, the Rastogis the ...