Eponyms

An eponym is a word derived from someone's name.  For example,
the sandwich is named for the Earl of Sandwich who, not wishing
to be called away from a lively game of cards, bid a servant to
bring him a serving of meat between two slices of bread so as,
informally, to sate his hunger.

Eponym from
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Eponym
from The American HeritageŽ Dictionary

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Vocabulary Energizers Stories of Word Origins by David Popkin 2 Volumes