I am having a problem with \citename dropping a name article, e.g. printing "Foerster" instead of "Von Foerster" in the following example:
\documentclass{article}
\usepackage{biblatex}
\usepackage{filecontents}
\DeclareNameFormat{idem}{%
\usebibmacro{name:last}{#1}{#3}{#5}{#7}%
\usebibmacro{name:andothers}}
\newcommand*{\person}[2]{%
\citename{#1}[#2]{author}%
}
\begin{filecontents}{\jobname.bib}
@incollection{foerster1979cybernetics,
AUTHOR = "von Foerster, Heinz"
}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
\person{foerster1979cybernetics}{idem} described this as a shift from...
\end{document}
How can I change this to properly print "Von Foerster described this as a shift from..." (it should automatically capitalise the 'v' as the macro appears at the beginning of a sentence).