From Longman Dictionary of Contemporary Englishnamesakename‧sake /ˈneɪmseɪk/ noun → somebody’s namesake
Examples from the Corpus
namesake• Peters, like his familial namesake, was a hoper.• But hardly for his present namesake.• Modelled on its Princeton namesake, it is funded mainly by the state of Berlin.• Mr Coleman is as diffident as his television namesake, at the microphone, is garrulous.• Indeed, in political terms Die-hard conservatism proved to be even less relevant than its pre-war namesake.Origin namesake (1600-1700) Probably from name's sake 