Noun
a count who exercised royal authority in his own domain
Source: WordNetcount-palatine
Leopold's brother Henry (surnamed Jasomirgott, allegedly from his favourite oath, "So help me God!") was made count palatine of the Rhine in 1140, and became margrave of Austria on Leopold's death in 1141. Source: Internet
In 1533, the count palatine converted Palatinate-Zweibrücken to the new Protestant faith. Source: Internet