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\indvdldef{Dudly}{Dudly} \indvdldef{Petunia}{Petunia}[\matrilineal] \indvdldef{Harry}{Harry} \indvdldef{Lily}{Lily}[\matrilineal] \sblngdef{sis}{Petunia,Lily} \gensdef{twofam}{sis}{% {Petunia}{Dudly},% {Lily}{Harry}% } \begin{tabular}{l} \fbox{\usebox{\sis}}\\ \\ \fbox{\usebox{\twofam}} \end{tabular}