Andrijaš Vukašinović Mrnjavčević or Andrija Kraljević (?) was a 14th-century Serbian noble who governed the region of Prilep 1371–1395.
The Serbian cross is found in the Korenić-Neorić Armorial (1595), which shows the coat of arms of Serbia (Svrbiae) as a white cross over a red background, with four firesteels, also depicting the Mrnjavčević noble house with the same design, with inverted colours and the Serbian eagle in the center of the cross.
The Nemanyid Dynasty's Coat of Arms was the double-headed eagle (later, post-Imperial houses adopted the symbol as an continuation, like Mrnjavčević and Lazarević for instance).