Question: Who is the paternal grandfather of Sigebert Ii?
Sentence (from "Theuderic II"): Theuderic II (also Theuderich, Theoderic, or Theodoric; in French, "Thierry") (587–613), king of Burgundy (595–613) and Austrasia (612–613), was the second son of Childebert II.
Relevant evidence: Yes