Question: Who is the paternal grandfather of Heraklonas?
Sentence (from "Heraklonas"): Constantine Heraclius (Latin: "Flavius Constantinus Heraclius (Heraclianus)"; 626–641), commonly known by the diminutive Heraklonas or Herakleonas , or rarely, Heraclius II, was the son of Heraclius and his niece Martina.
Relevant evidence: Yes