\indvdldef{Robert}{Robert Crawley}[7th Earl of Grantham]
\indvdldef[\ftblank]{Cora}{Cora Crawley}
          [Countess of Grantham,\haschild]
\mrrgdef{seven}{}{Robert}{Cora}
\fbox{\usebox{\seven}}
%
\hfill\hskip0pt
\makeatletter
\let\nameuse=\@nameuse
\makeatother
\newcommand{\boxsz}[1]{%
  \texttt{\textbackslash#1} & \nameuse{#1}\\%
}
\newcommand{\tblA}{%
  \begin{tabular}{l|l}%
    \boxsz{sevennameCY}%
    \boxsz{sevenRobertnameCY}%
    \boxsz{sevenCoramrrgCY}%
  \end{tabular}%
}
\par
\bigskip
\hfill\tblA