An evolutionary computation method was elaborated to model the evo-lution of the scripts.
The developed similarity feature groups contain the possi-ble lineage models of the
graphemes of the examined scripts. The elaborated method was applied in the examination
of the evolution of the Rovash scripts as taxons, some of the writing systems of the
people of the Eurasian Steppe, including the Turkic Rovash (Turkic runiform) and the
Székely-Hungarian Rovash among others. Using the phenetic model of the scripts concerned
with the cladistic considerations, the analysis of the newly developed areal spec-trum,
the script spectrum and the group spectrum supported the preliminary as-sumption that
the four examined scripts had a single common predecessor, the so-called Proto-Rovash.
