Unable to tag names to photos

I have Lightroom (not CC) and imported over 60,000 photos that I am now ready to tag names to the people.  I cannot figure how to add names to some of the photos and then have the system search for one of them so I can tag batches of them with the same person in them.  I cannot find a User Manual and all I was able to find via Google/Adobe site is that tagging and batch adding names existed.  Any idea how I can do this?  Thanks!!