What is the best way to locate a long lost friend?

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I had a class mate wheni ws in class II over 50 years back. the only memory of him that I have is his name which I have surprisingly remembered all through these years. I remember his an dhis brother's name. I trie dto seacch for him on the internet but came up with a person with the same name as his brother but it turned out to be someone much younger. I wonder if there is any way i can locate this friend.