Blagdan families are Croats and they are mostly from the Island of Ugljan. In the past century, relatively most of Croatian residents bearing this family name were born on the Island of Rab and in Zadar.
Prevalence
About 90 people with faimily name Blagdan live in Croatia today, in 40 households. There were 90 of them in the middle of the past century, and their number remains constant. They are located in four Croatian counties, four cities and 5 other places, mostly in Palit on the Island of Rab (40), Kukljica on the Island of Ugljan (25), Zadar (15), Split (<10), and in Banjol on the Island of Rab (<10).
Outside Croatia
At least two families with this surname emigrated from Croatia to the United States. Family name Blagdan is present in 6 countries on three continents. The family name "Blagdan " is used by small number of people in the United States.
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.