Tuđan families are Croats and they are mostly from Varazdin area. In the past century, relatively most of Croatian residents bearing this family name were born in Varazdin and in Varazdin area.
Prevalence
About 250 people with faimily name Tuđan live in Croatia today, in 110 households. There were 170 of them in the middle of the past century, and their number increased by 40 percent. They are located in the most of Croatian counties, in 11 cities and 22 other places, mostly in Trnovec in Varazdin area (115), Varazdin (35), Bartolovec in Varazdin area (25), Garesnica (10), and in Kaniska Iva (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.