Vendor

google

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late 16th century: from Anglo-Norman French vendour (see vend).

wiktionary

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Borrowed from Anglo-Norman vendor (Old French vendeor), from Latin venditor(“seller”), from vendere(“to sell, cry up for sale, praise”), contraction of venundare, venumdare, also, as originally, two words venum dare(“to sell”), from venum(“sale, price”) + dare(“to give”).

etymonline

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vendor (n.)

1590s, from late Anglo-French vendor, from vendre "to vend," from Latin vendere "to sell" (see vend). More common in legal use than vender.