[1] Miklosich was born in the small village of Radomerščak near the Lower Styrian town of Ljutomer, then part of the Austrian Empire, and baptized Franz Xav.

In 1844, he published a review of Franz Bopp's book Comparative Grammar, which attracted attention from the Viennese academic circles.

[1] From 1872 to 1880, Miklosich published his original survey of Romani dialects, Über die Mundarten und Wanderungen der Zigeuner Europas.

He identified a substantial Greek element that was shared by the Romani dialects, and thus named a "Greek-speaking area" as the "European homeland of the Gypsies".

He was the chairman of the political association, called Slovenija (Slovenia) organized by Slovene students that studied in Graz and Vienna.