达菲 is best known in mainland China as the brand name of Tamiflu (oseltamivir), the antiviral prescribed during flu and avian-flu outbreaks. It's also the standard transliteration of Western surnames like Duffy and the Looney Tunes character Daffy Duck (
达菲鸭, Dáfēi Yā). Context tells you which:
吃达菲 'take Tamiflu' vs
达菲家 'the Duffy family'.
