Butko families are Croats and they are mostly from Lepoglava area. In the past century, relatively most of Croatian residents bearing this family name were born in Donji Miholjac area and in Lepoglava area.
Prevalence
About 100 people with faimily name Butko live in Croatia today, in 40 households. There were 90 of them in the middle of the past century, and their number increased by 10 percent. They are located in the most of Croatian counties, in 17 cities and 13 other places, mostly in Tribunj (15), Donja Visnjica (15), Visnjevac (<10), Nustar in Vinkovci area (<10), and in Moslavina Podravska in Donji Miholjac area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.