A friend of mine owned chassis# 1003 some 20 years ago or so, and when another car appeared with the claim to be WRE 1003, we spent some time researching these three cars in an effort to authenticate the real car. In all that time, I don't recall encountering any name other than "WRE" or "WRE-Maserati."
I just discussed this with the historian who documented chassis# 1002 for sale at auction some time ago. In all of the documents he reviewed, including period magazine articles, race records, etc., he never came across any name for this car other than WRE.
So it appears this is will be a difficult one to find!
Is the word that appears in your source the name of an animal?