Slugan families are Croats and they are mostly from Drnis area. In the past century, relatively most of Croatian residents bearing this family name were born in Drnis area and in Split.
Prevalence
About 70 people with faimily name Slugan live in Croatia today, in 30 households. There were 0 of them in the middle of the past century, and their number multiplied. They are located in four Croatian counties, in 7 cities and threee other places, mostly in Sibenik (20), Split (20), Kastel Luksic (10), Kastel Stari (10), and in Knin (<10).
Outside Croatia
Family name Slugan is present in this form only in Croatia.
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.