Hanoverian

 Longman Dictionary of Contemporary English Online朗文当代英语 5++LDOCE Online朗文 5++Han·o·ve·ri·an /ˌhænəʊˈvɪəriən◂/ adjective  of or supporting the line of English kings and queens which originally came from Hanover and ruled from 1714 to 1901 George III was a Hanoverian king.

Han·o·ve·ri·an adjectiveSyllable  

Hanoverian
Han‧o‧ve‧ri‧an /ˌhænəʊˈvɪəriən◂/ adjective
of or supporting the line of English kings and queens which originally came from Hanover and ruled from 1714 to 1901:
    George III was a Hanoverian king.