There are a few effective ways to identify a person's name from a photo. One popular option is to use a reverse image search tool like TinEye or PimEyes. These services allow you to upload an image or provide a URL, and they will search the web to find other instances where that image appears. This can potentially reveal the person's identity if their name is mentioned on any of the websites where the image is used.
Another approach is to use a facial recognition search engine like FaceCheck or Search4faces. These tools use advanced artificial intelligence and machine learning to analyze the faces in an uploaded image and attempt to match them to online profiles and identities. While the accuracy of these systems can vary, they can sometimes uncover a person's name or other identifying details based on the facial features in the photo. With a bit of searching, it's often possible to identify an individual from a photo, though the reliability of the results will depend on the quality of the image and the tools used.