[[FileDelwedd:Big Mac hamburger.jpg|thumbbawd|Big Mac hamburger]]'''Big Mac''' yw enw ar byrgyr rydych yn gallu ei brynu o [[McDonalds]]. Crëwyd y Big Mac gan [[Jim Delligatti]], [[franchisee Ray Kroc]] cynnar, <ref>{{cite book | last=Eldridge | first=D. | title=Moon Pittsburgh | publisher=Avalon Publishing | series=Moon Handbooks | year=2014 | isbn=978-1-61238-846-5 | url=https://books.google.com/books?id=ThbPBQAAQBAJ&pg=PT389 | access-date=November 7, 2017 | page=pt389}}</ref> a oedd yn rhedeg nifer o fwytai yn yr ardal [[Pittsburgh]]. Fe'i dyfeisiwyd yng nghegin rhyddfraint cyntaf [[McDonalds]] Delligatti, a leolir ar McKnight Road mewn tref maestrefol Ross <ref name="test">{{cite news | url= https://news.google.com/newspapers?nid=1129&dat=19930504&id=z6kkAAAAIBAJ&sjid=0G4DAAAAIBAJ&pg=5788,2805664 | title= Golden Arch Angel | work= [[Pittsburgh Post-Gazette]] | first= Barbara | last= Vancheri | date= May 4, 1993 | page= C1 | access-date= October 7, 2016 | archive-url= https://web.archive.org/web/20160502024800/https://news.google.com/newspapers?nid=1129&dat=19930504&id=z6kkAAAAIBAJ&sjid=0G4DAAAAIBAJ&pg=5788,2805664 | archive-date= May 2, 2016 | dead-url= no | df= mdy-all }}</ref>. Roedd gan y Big Mac ddau enw blaenorol, y ddau ohonynt wedi methu yn y farchnad: yr Aristocrat, a gafodd y defnyddwyr yn anodd ei ddatgano a'i ddeall, a [[Burger Ribbon Blue]]. Crëwyd y trydydd enw, Big Mac gan Esther Glickstein Rose, ysgrifennydd hysbysebu 21 oed a fu'n gweithio ym mhencadlys corfforaethol [[McDonalds]] yn Oak Brook, [[Illinois]]. <ref name="bigmacname">{{cite news | url=http://www.apnewsarchive.com/1985/Woman-Who-Named-Big-Mac-Finally-Recognized/id-4338738fbc4ed82ddfcd5700c17d6ebd | title=Woman Who Named Big Mac Finally Recognized | agency=[[Associated Press]] | date=May 31, 1985 | accessdate=February 22, 2013 | archive-url=https://web.archive.org/web/20130613212414/http://www.apnewsarchive.com/1985/Woman-Who-Named-Big-Mac-Finally-Recognized/id-4338738fbc4ed82ddfcd5700c17d6ebd | archive-date=June 13, 2013 | dead-url=no | df=mdy-all }}</ref> Dadansoddodd y Big Mac yn fwyty Undell Delligatti, [[Pennsylvania]] ym 1967, gan werthu am 45 cents. <ref name="delligatti">{{cite press release|title= Jim Delligatti Biography|url= http://www.mcdepk.com/bigmac/mediadocs/bio_Jim_MJ_Delligatti.pdf|publisher= McDonald's|year= 2007|accessdate= May 18, 2011|deadurl= yes|archiveurl= https://web.archive.org/web/20110726163742/http://www.mcdepk.com/bigmac/mediadocs/bio_Jim_MJ_Delligatti.pdf|archivedate= July 26, 2011|df= mdy-all}}</ref> Fe'i cynlluniwyd i gystadlu â 'Big Boy [[hamburger]] Bwyty Big Boy; Eat'n Park oedd [[Pittsburgh]] ardal [[Big Boy franchisee]] ar y pryd. <ref>{{cite news |title=Obituary: William D. Peters / President of Eat'n Park restaurants |url=http://old.post-gazette.com/obituaries/20000820peters4.asp |newspaper=Pittsburgh Post-Gazette |date=August 20, 2000 |accessdate=September 28, 2013 |archive-url=https://web.archive.org/web/20131213042837/http://old.post-gazette.com/obituaries/20000820peters4.asp |archive-date=December 13, 2013 |dead-url=no }}</ref> Roedd y Big Mac yn boblogaidd ac fe'i ychwanegwyd at y fwydlen pob bwyty yn yr Unol Daleithiau ym 1968. <ref name="delligatti">{{cite press release|title= Jim Delligatti Biography|url= http://www.mcdepk.com/bigmac/mediadocs/bio_Jim_MJ_Delligatti.pdf|publisher= McDonald's|year= 2007|accessdate= May 18, 2011|deadurl= yes|archiveurl= https://web.archive.org/web/20110726163742/http://www.mcdepk.com/bigmac/mediadocs/bio_Jim_MJ_Delligatti.pdf|archivedate= July 26, 2011|df= mdy-all}}</ref>
