hi I have an extension already installed in my pc and I also have the installation file, I wanted to know if it is possible to create another extension with the same characteristics but with my name

What do you mean by "with my name". Do you want to edit the menu-text or do you want to make it look like you are the author?

I have an extension with a name and I would like to change the name of the extension

If you can localize the .inx and .py file of the extension you can make a copy and rename those files or just edit them directly. Then you can edit the inx file:

In the attached image I have highlighted some parts in a simple code of mine to illustrate some places where you can edit the file.

After the <name> tag you define what appear in the extension menu under the submenu defined after the <submenu> tag. If you write a submenu name that do not already exist a new submenu will appear. The <name> will also be the title of the window that pops up when you run the extension.

If you rename the .py file you will have need to change the filename where it appear in the .inx file.

It will be optional to change the <id>..

Grazie mille @EllenWasbo , thank you