The best search engine to find photos of someone is Google Images. Google Images has a massive database of images and offers a reverse image search feature, which allows you to upload or provide a URL of an image and it will search for visually similar or matching images across the web. This can be extremely helpful in finding photos of a specific person, as it can locate other instances of that photo online, potentially leading you to more images of that individual. Additionally, Google Images provides advanced search options to narrow down your results, such as filtering by size, color, or time period. While other reverse image search engines like TinEye and Berify are also effective, Google Images remains the most comprehensive and user-friendly option for finding photos of someone online.