Well some are easy.\n\n--Greek peole tend to have "is", "us" "os" at the end of their name "Spinakis, Stephonopolus"\n--Some jewish people have 'stein' or 'berg' or 'man' in their name...  Rosenstein, Goodman, Speilberg\n--Irish people have "O'" or "Fitz" or "Mac" like "O'Mally" and "Fitzpatrick" and "Macdonald"\n--Italian last names tend to end with "oni" or "o" or start with Di.  "DiAngelo" "Alberto" "Romano" "Belisconi"\n--Many French names start with "De" "des" "du" and "le" or end with "eau" "elet" "elin" "elle" \n--many russian names end in "ovich" or "ova".\n----Many Polish surnames end with "owski".  Lebowski, etc....