The surname is the 554,992 nd most frequently used last name on a worldwide basis, borne by around 1 in 12,696,073 people. The last name Kostos is predominantly found in Oceania, where 43 percent of Kostos live; 43 percent live in Australasia and 43 percent live in Australia and New Zealand. Kostos is also the 1,396,783 rd most frequently used ...