Question: Who is Lothair Ii's paternal grandfather?
Sentence (from "Lothair I"): Lothair I or Lothar I (Dutch and Medieval Latin: "Lotharius", German: "Lothar", French: "Lothaire", Italian: "Lotario") (795 – 29 September 855) was the Holy Roman Emperor (817–855, co-ruling with his father until 840), and the governor of Bavaria (815–817), King of Italy (818–855) and Middle Francia (840–855).
Relevant evidence: No