In Croatia, Eckhardt families are Croats (from Osijek ).
Prevalence
Only a few people with faimily name Eckhardt live in Croatia today, in two households only. They are located in only threee naselja i to in Osijek (<5), Medulin in Pula area (<5), and in Kranjci (<5).
Outside Croatia
At least two families with this surname emigrated from Croatia to the United States (1) and Germany (1). Family name Eckhardt is present in 48 countries worldwide. The family name "Eckhardt " is used by some 9000 people in Germany , about 6000 in the United States , and some 2000 people in Brazil.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1932 in source Emigration Commission Zagreb.