Rebranding with the same website

[signsny]

Hello,

I like to rebrand my site for the same URL - How can i do this?
Example:  My site URL is www.signsny.com and i used "SignsNY" as brand name and citations and after the website redesign, i decide to go with "Signs NY" so i change the citations and pick the word as Signs NY to use but in google i lost the site links and knowledge graph on **Signs NY **keyword.......... Can you suggest me what to do and how to change the things for better results?

Thanks,
Abie