# Change abstractname [duplicate]

I'm using the book class in my document and I created an abstract using this piece of code:

\newenvironment{abstract}%
{\cleardoublepage\thispagestyle{empty}\null\vfill\begin{center}%
\bfseries\abstractname\end{center}
{\vfill\null}


Now I would like to change \abstractname. I tried \renewcommand{\abstractname}{Name}, but it didn't work.