It only changes one form of my name, not short forms.
Personally I use the xkcd substitutions 3 extension. It is more flexible.
It can highlight substitutions if needed, and you can also blacklist certain sites from the substitutions if needed. https://chrome.google.com/webstore/detail/xkcd-substitutions-3/amndhbbfigfkijfpkiklleackcjnajmd
Thanks to the Courtesy of :