eponym
noun
ep·onym ˈe-pə-ˌnim 
1
: one for whom or which something is or is believed to be named
2
: a name (as of a drug or a disease) based on or derived from an eponym
eponymic
ˌe-pə-ˈni-mik
adjective 
Example Sentences
Joseph Banks was surely the eponym of eponyms. From Alaska to Indonesia, from Tierra del Fuego to Tasmania, there are capes, islands, straits, mountains, bays, points, channels, peninsulas, counties and towns named after him. 
Pat Rogers, Times Literary Supplement, 3–9 June 1988 Toadfishes burp the songs of their eponyms; one sort of toadfish is called the singing midshipman. John Hersey, Harper's, May 1987 Almost from the onset of television, congressmen have realized the promotional potential of the carefully scripted hearing: the McCarthy and Kefauver hearings of the 1950s, which were among the first "televison events," made their eponyms famous. Gregg Easterbrook, Atlantic, Dec. 1984
Pat Rogers, Times Literary Supplement, 3–9 June 1988 Toadfishes burp the songs of their eponyms; one sort of toadfish is called the singing midshipman. John Hersey, Harper's, May 1987 Almost from the onset of television, congressmen have realized the promotional potential of the carefully scripted hearing: the McCarthy and Kefauver hearings of the 1950s, which were among the first "televison events," made their eponyms famous. Gregg Easterbrook, Atlantic, Dec. 1984 Recent Examples on the Web A decade later, the rollicking races were inspired by a different davenport, an eponym for a large, upholstered sofa like those manufactured by the A.H. Davenport Co. furniture company in East Cambridge, Massachusetts. oregonlive, 30 July 2022 Her troubles begin with her name; Daiyu’s eponym is Lin Daiyu, a tragic figure of legend who dies spitting blood after the family of her beloved tricks him into marrying someone else. New York Times, 3 Apr. 2022 Paying homage to the year the winery was founded, the 1926 Cuvée is an eponym created from grapes harvested throughout the most esteemed vineyards in the DOCG. Jillian Dara, Forbes, 23 Dec. 2021 With a precision befitting its military eponym, the newsletter articulates style concerns yet to be uttered in the public sphere. Nathan Taylor Pemberton, The New Yorker, 10 Dec. 2021 His dog, Bernie, leaps into the frame, something about his shaggy visage evoking his eponym. New York Times, 1 Oct. 2021 This school was built in 1922 after the school’s eponym, a prominent Dallas businessman, ranch owner, and philanthropist, bequeathed DISD $5,000. Naomi Kaskela, Dallas News, 18 Aug. 2021 Sitting courtside, Team Kidd’s eponym clearly delighted in the progress the fledgling program has made. Dallas News, 22 Aug. 2021 The county's board of supervisors decided in an unanimous vote on Thursday to change county's official eponym, according to a press release. Caitlin O'kane, CBS News, 25 June 2021 See More
oregonlive, 30 July 2022 Her troubles begin with her name; Daiyu’s eponym is Lin Daiyu, a tragic figure of legend who dies spitting blood after the family of her beloved tricks him into marrying someone else. New York Times, 3 Apr. 2022 Paying homage to the year the winery was founded, the 1926 Cuvée is an eponym created from grapes harvested throughout the most esteemed vineyards in the DOCG. Jillian Dara, Forbes, 23 Dec. 2021 With a precision befitting its military eponym, the newsletter articulates style concerns yet to be uttered in the public sphere. Nathan Taylor Pemberton, The New Yorker, 10 Dec. 2021 His dog, Bernie, leaps into the frame, something about his shaggy visage evoking his eponym. New York Times, 1 Oct. 2021 This school was built in 1922 after the school’s eponym, a prominent Dallas businessman, ranch owner, and philanthropist, bequeathed DISD $5,000. Naomi Kaskela, Dallas News, 18 Aug. 2021 Sitting courtside, Team Kidd’s eponym clearly delighted in the progress the fledgling program has made. Dallas News, 22 Aug. 2021 The county's board of supervisors decided in an unanimous vote on Thursday to change county's official eponym, according to a press release. Caitlin O'kane, CBS News, 25 June 2021 See More Word History
Etymology
Greek epōnymos, from epōnymos eponymous, from epi- + onyma name — more at name
First Known Use
1846, in the meaning defined at sense 1
Medical Definition
eponym
noun
ep·onym ˈep-ə-ˌnim
1
: the person for whom something (as a disease) is or is believed to be named
2
: a name (as of a drug or a disease) based on or derived from the name of a person